public Problem0025()
{
var stopWatch = new Stopwatch();
stopWatch.Start();
long result = 2;
// Solution:
BigInteger number1 = 1;
BigInteger number2 = 1;
BigInteger help;
do
{
help = number2;
number2 += number1;
number1 = help;
result++;
} while (number2.ToString().Length < 1000);
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(
25, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0002()
{
var stopWatch = new Stopwatch();
stopWatch.Start();
long result = 0;
long n = 10000;
// Solution:
long fibo1 = 1;
long fibo2 = 1;
while (fibo1 < n)
{
if ((fibo1 = fibo2 + (fibo2 = fibo1)) % 2 == 0 && fibo1 < n)
{
result += fibo1;
}
}
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(2, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0039()
{
var stopWatch = new Stopwatch();
stopWatch.Start();
long result = 0;
// Solution:
var maxSolutions = 0;
for (var i = 1000; i > 2; i--)
{
var solutions = numberOfSolutions(i);
if (solutions > maxSolutions)
{
maxSolutions = solutions;
result = i;
}
}
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(
39, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0042()
{
var words = readWords();
var stopWatch = new Stopwatch();
stopWatch.Start();
ulong result = 0;
// Solution:
var triangles = generateTriangles(15 * 26);
foreach (var word in words)
{
if (triangles.Contains((int)wordValue(word)))
{
result++;
}
}
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(
42, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0018()
{
var arr = Fill();
var stopWatch = new Stopwatch();
stopWatch.Start();
long result = 0;
// Solution:
for (var i = arr.Length - 1; i > 0; i--)
{
for (var j = 0; j < arr[i].Length - 1; j++)
{
arr[i - 1][j] += Math.Max(arr[i][j], arr[i][1 + j]);
}
}
result = arr[0][0];
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(
18, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0005()
{
var stopWatch = new Stopwatch();
stopWatch.Start();
ulong result = 1;
// Solution:
ulong[] primes = { 3, 5, 7, 11, 13, 17, 19 };
foreach (var p in primes)
{
result *= p * (20 / p);
}
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(5, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0006()
{
var stopWatch = new Stopwatch();
stopWatch.Start();
ulong result = 0;
// Solution:
ulong a = 0;
ulong b = 0;
for (ulong i = 1; i < 101; i++)
{
a += i;
b += i * i;
}
result = a * a - b;
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(6, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0056()
{
var stopWatch = new Stopwatch();
stopWatch.Start();
BigInteger result = 0;
// Solution:
for (var a = 2; a < 100; a++)
{
for (var b = 2; b < 100; b++)
{
var dSum = DigitSum(BigInteger.Pow(a, b));
if (dSum > result)
{
result = dSum;
}
}
}
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(
56, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0029()
{
var stopWatch = new Stopwatch();
stopWatch.Start();
long result = 0;
// Solution:
var set = new HashSet <BigInteger>();
for (var i = 2; i <= 100; i++)
{
for (var j = 2; j <= 100; j++)
{
set.Add(BigInteger.Pow(j, i));
}
}
result = set.Count;
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(
29, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0022()
{
var names = File.ReadAllText(@"resources\problem0022_names.txt").Replace("\"", "").Split(",");
var stopWatch = new Stopwatch();
stopWatch.Start();
// Solution:
Array.Sort(names);
var result = names.Select(t => t.Aggregate <char, long>(0, (current, c) => current + (c - 64)))
.Select((score, i) => score * (i + 1)).Sum();
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(
22, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0001()
{
var stopWatch = new Stopwatch();
stopWatch.Start();
long result = 0;
// Solution:
long n = 1000;
result = sum(--n, 3) + sum(n, 5) - sum(n, 15);
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(1, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0040()
{
var stopWatch = new Stopwatch();
stopWatch.Start();
long result = 0;
// Solution:
var concatenated = concatenate(1_000_000);
var n = 1;
result = concatenated[n] - 48;
for (var i = 0; i < 6; i++)
{
n = int.Parse(n + "0");
result *= concatenated[n] - 48;
}
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(
40, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0706()
{
var stopWatch = new Stopwatch();
stopWatch.Start();
BigInteger result = 0;
// Solution:
result = BigF(100_001) % 1_000_000_007;
Console.WriteLine(
(3 * 1150500 / 2267
+ BigInteger.Parse("9" + new string('0', 99999)))
* 2267 / 6750 % 1_000_000_007
);
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
ProblemBenchmark.AddTime(
706, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
public Problem0684()
{
var stopWatch = new Stopwatch();
stopWatch.Start();
long result = 0;
// Solution:
var fibo = Fibo(90);
for (var k = 2; k <= 90; k++)
{
result += ModS(fibo[k]);
result %= mod;
}
if (result < 0)
{
result += mod;
}
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(
684, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0016()
{
var stopWatch = new Stopwatch();
stopWatch.Start();
long result = 0;
// Solution:
var n = BigInteger.Pow(2, 1000);
foreach (var c in n.ToString())
{
result += c - 48;
}
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(
16, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0048()
{
var stopWatch = new Stopwatch();
stopWatch.Start();
BigInteger result = 0;
// Solution:
for (var i = 1; i < 1000; i++)
{
result += BigInteger.Pow(i, i);
}
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result.ToString().Substring(result.ToString().Length - 10) + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(
48, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0015()
{
var stopWatch = new Stopwatch();
stopWatch.Start();
// Solution:
BigInteger n = 1;
BigInteger k = 1;
for (var i = 21; i < 40; i++)
{
n = n * i;
k = k * (i - 20);
}
n = n / k * 2;
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + n + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(
15, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0024()
{
var stopWatch = new Stopwatch();
stopWatch.Start();
// Solution:
var n = 1000000;
var permutations = new string[n];
var first = "0123456789";
Permute(permutations, "", first);
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + permutations[n - 1] + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(
24, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0013()
{
var numbers = fill();
var stopWatch = new Stopwatch();
stopWatch.Start();
var result = new BigInteger(0);
// Solution:
foreach (var bI in numbers)
{
result = result + bI;
}
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(
13, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0023()
{
var stopWatch = new Stopwatch();
stopWatch.Start();
long result = 1;
// Solution:
var abundant = new List <int>();
var sumOfTwo = new bool[28123 + 1];
for (var i = 2; i <= 28123; i++)
{
long sum = 1;
var root = Math.Sqrt(i);
for (var j = 2; j <= root; j++)
{
if (i % j == 0)
{
sum += j + (root == j ? 0 : i / j);
}
}
if (sum > i)
{
abundant.Add(i);
}
}
for (var i = 0; i < abundant.Count; i++)
{
for (var j = i; j < abundant.Count; j++)
{
sumOfTwo[abundant[i] + abundant[j] < 28123 ? abundant[i] + abundant[j] : 24] = true;
}
}
for (var i = 2; i < 28123; i++)
{
if (!sumOfTwo[i])
{
result += i;
}
}
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(
23, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0206()
{
var stopWatch = new Stopwatch();
stopWatch.Start();
ulong result = 0;
// Solution:
var start = (ulong)Math.Sqrt(1020304050607080900.0);
var end = (ulong)Math.Sqrt(1929394959697989990.0);
// String pattern = "1.2.3.4.5.6.7.8.9.0";
// Regex regex = new Regex(pattern);
for (var i = start; i <= end; i += 10)
{
// if (regex.IsMatch((i * i) + ""))
// {
// result = i;
// break;
// }
var s = "" + i * i;
if (s.Length != 19)
{
continue;
}
if (s[16] == '9' &&
s[14] == '8' &&
s[12] == '7' &&
s[10] == '6' &&
s[8] == '5' &&
s[6] == '4' &&
s[4] == '3' &&
s[2] == '2' &&
s[0] == '1' &&
s[18] == '0')
{
result = i;
break;
}
}
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(
206, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0099()
{
var lines = File.ReadAllLines(@"resources\p099_base_exp.txt");
var numbers = new int[lines.Length, 2];
for (var i = 0; i < lines.Length; i++)
{
numbers[i, 0] = int.Parse(lines[i].Substring(0, lines[i].IndexOf(',')));
numbers[i, 1] = int.Parse(lines[i].Substring(lines[i].IndexOf(',') + 1));
}
var stopWatch = new Stopwatch();
stopWatch.Start();
var maxIndex = 0;
var number = numbers[0, 0];
var exponent = numbers[0, 1];
for (var i = 1; i < lines.Length; i++)
{
if (numbers[i, 1] > exponent)
{
var div = (double)numbers[i, 1] / exponent;
if (Math.Pow(numbers[i, 0], div) > number)
{
maxIndex = i;
number = numbers[i, 0];
exponent = numbers[i, 1];
}
}
else
{
var div = (double)exponent / numbers[i, 1];
if (Math.Pow(number, div) < numbers[i, 0])
{
maxIndex = i;
number = numbers[i, 0];
exponent = numbers[i, 1];
}
}
}
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + ++maxIndex + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(
99, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0058()
{
var stopWatch = new Stopwatch();
stopWatch.Start();
decimal result = 0;
// Solution:
primeArr = PrimeSieveButFast(100_000);
decimal all = 5;
decimal primes = 3;
decimal bottomLeft = 7;
decimal topLeft = 5;
decimal topRight = 3;
for (decimal i = 2;; i++)
{
bottomLeft += i * 8 - 2;
topLeft = bottomLeft - i * 2;
topRight = topLeft - i * 2;
all += 4;
if (IsPrime(bottomLeft))
{
primes++;
}
if (IsPrime(topLeft))
{
primes++;
}
if (IsPrime(topRight))
{
primes++;
}
if (10 * primes < all)
{
result = i * 2 + 1;
break;
}
}
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(
58, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0021()
{
var stopWatch = new Stopwatch();
stopWatch.Start();
long result = 0;
// Solution:
for (long i = 2; i <= 10000; i += 2)
{
long sum1 = 1;
var root = Math.Sqrt(i);
for (var j = 2; j <= root; j++)
{
if (i % j == 0)
{
sum1 += j + i / j;
}
}
if (sum1 == i)
{
continue;
}
long sum2 = 1;
root = Math.Sqrt(sum1);
for (var j = 2; j <= root; j++)
{
if (sum1 % j == 0)
{
sum2 += j + sum1 / j;
}
}
if (sum2 == i)
{
result += i;
}
}
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(
21, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0009()
{
var stopWatch = new Stopwatch();
stopWatch.Start();
long result = 0;
// Solution:
for (var i = 1; i < 500; i++)
{
for (var j = i; j < 500; j++)
{
for (var k = j; k < 500; k++)
{
if (i * i + j * j == k * k && i + j + k == 1000)
{
result = i * j * k;
goto end;
}
}
}
}
/*
* // Maurice Solution:
* for (int i = 1; i < 500; i++)
* {
* for (int j = i; j < 500; j++)
* {
* int k = 1000 - i - j;
* if (i * i + j * j == k * k)
* {
* result = i * j * k;
* goto end;
* }
* }
* }
*/
end:
{
}
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(9, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0045()
{
var stopWatch = new Stopwatch();
stopWatch.Start();
long result = 0;
// Solution:
for (var i = 144;; i++)
{
long h = i * (2 * i - 2);
long p = 0;
for (long j = 165; p != h; j++)
{
p = j / 2 * (3 * j + 1);
if (p > h)
{
goto end;
}
}
long t = 0;
for (long j = 285; t != h; j++)
{
t = j / 2 * (j + 1);
if (t > h)
{
goto end;
}
}
result = t;
break;
end:
{
}
}
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(
45, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0010()
{
var stopWatch = new Stopwatch();
stopWatch.Start();
long result = 0;
// Solution:
// for (long i = 11; i < 2000000; i += 2)
// {
// for (long j = 3; j <= (int) Math.Sqrt(i); j += 2)
// {
// if (i % j == 0)
// {
// goto end;
// }
// }
//
// result += i;
// end:
// {
// }
// }
//better (Maurice):
var bools = new bool[2000000];
for (var i = 2; i < bools.Length; i++)
{
if (!bools[i])
{
result += i;
for (var j = i; j < bools.Length; j += i)
{
bools[j] = true;
}
}
}
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(
10, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0081()
{
var lines = File.ReadAllLines(@"resources\p081_matrix.txt");
var matrix = new int[lines.Length, lines.Length];
for (var i = 0; i < lines.Length; i++)
{
var numbers = lines[i].Split(',');
for (var j = 0; j < numbers.Length; j++)
{
matrix[i, j] = int.Parse(numbers[j]);
}
}
var stopWatch = new Stopwatch();
stopWatch.Start();
long result = 0;
// Solution:
var gridSize = matrix.GetLength(0);
for (var i = gridSize - 2; i >= 0; i--)
{
matrix[gridSize - 1, i] += matrix[gridSize - 1, i + 1];
matrix[i, gridSize - 1] += matrix[i + 1, gridSize - 1];
}
for (var i = gridSize - 2; i >= 0; i--)
{
for (var j = gridSize - 2; j >= 0; j--)
{
matrix[i, j] += Math.Min(matrix[i + 1, j], matrix[i, j + 1]);
}
}
result = matrix[0, 0];
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(
81, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0059()
{
var encryptedStrings = File.ReadAllText(@"resources\p059_cipher.txt").Split(',');
var encrypted = new char[encryptedStrings.Length];
for (var i = 0; i < encrypted.Length; i++)
{
encrypted[i] = (char)int.Parse(encryptedStrings[i]);
}
var stopWatch = new Stopwatch();
stopWatch.Start();
long result = 0;
// Solution:
for (var a = 'a'; a <= 'z'; a++)
{
for (var b = 'a'; b <= 'z'; b++)
{
for (var c = 'a'; c <= 'z'; c++)
{
var decrypted = new char[encrypted.Length];
for (var i = 0; i < decrypted.Length; i++)
{
decrypted[i] = (char)(encrypted[i] ^ (i % 3 == 0 ? a : i % 3 == 1 ? b : c));
}
var dec = new string(decrypted);
if (!dec.Contains("Euler"))
{
continue;
}
// Console.WriteLine("\r" + a + b + c + "\t" + dec);
result = decrypted.Aggregate(result, (current, ch) => current + ch);
}
}
}
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(
59, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}
public Problem0004()
{
ulong biggestFactor = 9999;
var stopWatch = new Stopwatch();
stopWatch.Start();
ulong result = 0;
// Solution:
for (var i = biggestFactor * biggestFactor; i > 0; i--)
{
var test = (i + "").ToCharArray();
for (ulong j = 0; j < (ulong)(test.Length / 2); j++)
{
if (test[j] != test[(ulong)test.Length - j - 1])
{
goto outer;
}
}
result = i;
//check if multiple of 3-digit numbers:
for (var j = biggestFactor; j > Math.Sqrt(result); j--)
{
if (result % j == 0)
{
goto end;
}
}
outer:
{
}
}
end:
{
}
stopWatch.Stop();
var elapsedTime = stopWatch.Elapsed.ToString();
Console.WriteLine("Result:\t" + result + "\tTime:\t" +
(double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1, 2)) >= 1
? double.Parse(elapsedTime.Substring(elapsedTime.LastIndexOf(":") + 1)) + " s"
: double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000 +
" ms"));
if (ProblemTest.DoBenchmark)
{
ProblemBenchmark.AddTime(4, double.Parse(elapsedTime.Substring(elapsedTime.IndexOf(".") + 1)) / 10_000);
}
}