static Object PartB()
{
var input = ReadIndata.Ints(inputPath);
input.Add(0);
input.Add(input.Max() + 3);
input.Sort();
long ans = 1;
int i = 0;
int z = input.Count;
var combs = new int[] { 0, 1, 1, 2, 4, 7 };
while (i < z - 1)
{
int n = 1;
while ((i + n < z) && (input[i + n] - input[i + n - 1] == 1))
{
n++;
}
ans *= combs[n];
i += n;
}
Console.WriteLine("Part B: Result is {0}", ans);
return(ans);
}
static Object PartB()
{
var input = ReadIndata.Ints(inputPath);
int ans = MemoryGame(input, 30000000);
Console.WriteLine("Part B: Result is {0}", ans);
return(ans);
}
static Object PartA()
{
var input = ReadIndata.Ints(inputPath);
int ans = 0;
Console.WriteLine("Part A: Result is {0}", ans);
return(ans);
}
static Object PartA()
{
var input = ReadIndata.Ints(inputPath);
input.Add(0);
input.Add(input.Max() + 3);
input.Sort();
var d = new int[] { 0, 0, 0, 0 };
for (int i = 1; i < input.Count; i++)
{
d[input[i] - input[i - 1]]++;
}
int ans = d[1] * d[3];
Console.WriteLine("Part A: Result is {0}", ans);
return(ans);
}
static Object PartA()
{
List <int> input = ReadIndata.Ints(inputPath);
input.Sort();
int ans = 0;
foreach (int a in input)
{
int b = 2020 - a;
if (input.Contains(b))
{
ans = a * b;
break;
}
}
Console.WriteLine("Part A: Result is {0}", ans);
return(ans);
}