public static void PluralForm()
{
var s = IOLibrary.ReadLine();
var text = (s[s.Length - 1] != 's') ? "s" : "es";
Console.WriteLine(s + text);
}
public static ModInt[] ReadModIntArray(int mod)
{
ModInt.Init(mod);
return(IOLibrary.ReadStringArray()
.Select(item => (ModInt)int.Parse(item))
.ToArray());
}
public static void PlacingMarbles()
{
var s = IOLibrary.ReadLine();
var ans = s.Count(c => c == '1');
Console.WriteLine(ans);
}
public static void ThreePointShot()
{
var(X, Y) = IOLibrary.ReadInt2();
var sub = Math.Abs(X - Y);
Console.WriteLine(IOLibrary.YesOrNo(sub < 3));
}
public static void MexBoxes()
{
var(N, K) = IOLibrary.ReadLong2();
var a = IOLibrary.ReadLongArray();
var sortedA = a.Sort().GroupBy(item => item);
var sum = 0L;
var num = -1L;
var boxNum = K;
foreach (var ball in sortedA)
{
if (ball.Key == num + 1)
{
//iに書き換える箱の個数
var x = Math.Min(ball.Count(), boxNum);
sum += x;
boxNum = x;
num = ball.Key;
}
}
Console.WriteLine(sum);
}
public static void HeavyRotation()
{
var N = IOLibrary.ReadInt();
var color = (N % 2 == 0) ? "White" : "Black";
Console.WriteLine(color);
}
public static void Box()
{
var(N, A, B) = IOLibrary.ReadInt3();
var num = N - A + B;
Console.WriteLine(num);
}
public static void GoodDistance()
{
var(N, D) = IOLibrary.ReadInt2();
var X = IOLibrary.ReadInt2DArray(N, D);
var count = 0L;
foreach (var pair in MathLibrary.GetCombinationIndexCollection(N, 2))
{
var i = pair[0];
var j = pair[1];
var squareLength = 0L;
for (var index = 0; index < D; index++)
{
var dx = X[i, index] - X[j, index];
squareLength += dx * dx;
}
var length = (int)Math.Sqrt(squareLength);
if (length * length == squareLength)
{
count++;
}
}
Console.WriteLine(count);
}
public static void SnukePrime()
{
var(N, C) = IOLibrary.ReadLong2();
var dic = new SortedDictionary <long, long>();
for (var i = 0L; i < N; i++)
{
var(a, b, c) = IOLibrary.ReadLong3();
if (dic.ContainsKey(a))
{
dic[a] += c;
}
else
{
dic.Add(a, c);
}
var afterB = b + 1;
if (dic.ContainsKey(afterB))
{
dic[afterB] -= c;
}
else
{
dic.Add(afterB, -c);
}
}
//集計
var array = dic.Values.ToArray();
var sum = 0L;
var startDay = 1L;
var prevCost = 0L;
var isFirst = true;
foreach (var keyValue in dic)
{
if (isFirst)
{
startDay = keyValue.Key;
prevCost = keyValue.Value;
isFirst = false;
}
else
{
var days = keyValue.Key - startDay;
var minCost = Math.Min(prevCost, C);
sum += minCost * days;
startDay = keyValue.Key;
prevCost += keyValue.Value;;
}
}
Console.WriteLine(sum);
}
public static void Log()
{
var n = IOLibrary.ReadLong();
var cost = n;
//n+1の分割
var ng = n + 1;
var ok = 0L;
//1+・・・+k<=n+1を満たす最大のkを求める
while (Math.Abs(ok - ng) > 1)
{
var middle = ok + (ng - ok) / 2;
//1からkまでの和
var sum = middle * (middle + 1) / 2;
if (sum <= n + 1)
{
ok = middle;
}
else
{
ng = middle;
}
}
var dividedNum = ok;
cost = cost - dividedNum + 1;
Console.WriteLine(cost);
}
public static void LargeRPSTournament()
{
var(n, k) = IOLibrary.ReadInt2();
var s = IOLibrary.ReadLine();
var queue = new Queue <char>(s);
var gameCount = 0;
while (k > 0)
{
queue = ARC100.TwiceQueue(queue);
var queueNum = queue.Count;
while (queueNum > 0)
{
var a = queue.Dequeue();
var b = queue.Dequeue();
queueNum -= 2;
var winner = ARC100.Judge(a, b);
gameCount++;
queue.Enqueue(winner);
}
if (gameCount >= k)
{
//第i回戦終了
k--;
gameCount = 0;
}
}
var champion = queue.Dequeue();
Console.WriteLine(champion);
}
public static void ATCoder()
{
var S = IOLibrary.ReadLine();
var str = "ACGT";
var ans = 0;
var count = 0;
foreach (var s in S)
{
if (str.Contains(s))
{
count++;
}
else
{
count = 0;
}
ans = Math.Max(ans, count);
}
Console.WriteLine(ans);
}
public static void GoToSchool()
{
var N = IOLibrary.ReadInt();
var A = IOLibrary.ReadIntArray()
.Select((content, index) => new
{
Content = content,
Index = index,
})
.ToArray();
Array.Sort(A,
(x, y) =>
{
if (x.Content == y.Content)
{
return(0);
}
else if (x.Content < y.Content)
{
return(-1);
}
else
{
return(1);
}
});
var ans = string.Join(" ", A.Select(a => a.Index + 1));
Console.WriteLine(ans);
}
public static void ReplacingInteger()
{
var(N, K) = IOLibrary.ReadLong2();
var remainder = N % K;
Console.WriteLine(Math.Min(remainder, K - remainder));
}
public static void QueenOnGrid()
{
var(H, W) = IOLibrary.ReadInt2();
var S = IOLibrary.ReadStringArray(H);
var ans = new ModInt[H, W];
//初期化
ans[0, 0] = 1;
for (var row = 1; row < H; row++)
{
if (S[row][0] != '#')
{
if (row == 1)
{
ans[row, 0] = 1;
}
else
{
ans[row, 0] = ans[row - 1, 0] * 2;
}
}
}
for (var col = 1; col < W; col++)
{
if (S[0][col] != '#')
{
if (col == 1)
{
ans[0, col] = 1;
}
else
{
ans[0, col] = ans[0, col - 1] * 2;
}
}
}
var horizontalSum = new ModInt[H, W];
var verticlSum = new ModInt[H, W];
var diagonalSum = new ModInt[H, W];
//集計
for (var row = 1; row < H; row++)
{
for (var col = 1; col < W; col++)
{
if (S[row][col] != '#')
{
horizontalSum[row, col] = horizontalSum[row - 1, col] + ans[row - 1, col];
verticlSum[row, col] = verticlSum[row, col - 1] + ans[row, col - 1];
diagonalSum[row, col] = diagonalSum[row - 1, col - 1] + ans[row - 1, col - 1];
ans[row, col] = horizontalSum[row, col] + verticlSum[row, col] + diagonalSum[row, col];
}
}
}
Console.WriteLine(ans[H - 1, W - 1]);
}
public static void GentlePairs()
{
var N = IOLibrary.ReadInt();
var points = IOLibrary.ReadInt2DArray(N);
var ans = 0;
for (var i = 0; i < N; i++)
{
for (var j = i + 1; j < N; j++)
{
if (i < j)
{
var pointI = points[i];
var pointJ = points[j];
var dx = Math.Abs(pointI[0] - pointJ[0]);
var dy = Math.Abs(pointI[1] - pointJ[1]);
if (dx >= dy)
{
ans++;
}
}
}
}
Console.WriteLine(ans);
}
public static void Twiblr()
{
var(A, B) = IOLibrary.ReadLong2();
var diff = 2 * A + 100 - B;
Console.WriteLine(diff);
}
public static void ChooseMe()
{
var N = IOLibrary.ReadInt();
var sub = 0L;
var subList = new List <long>();
for (var i = 0; i < N; i++)
{
var(A, B) = IOLibrary.ReadLong2();
sub -= A;
var sum = 2 * A + B;
subList.Add(sum);
}
subList.Sort();
var ans = 0;
while (sub <= 0)
{
sub += subList.Last();
subList.RemoveAt(subList.Count - 1);
ans++;
}
Console.WriteLine($"{ans}");
}
public static void Collinearity()
{
var N = IOLibrary.ReadInt();
var pArray = new Point[N];
for (var i = 0; i < N; i++)
{
var(x, y) = IOLibrary.ReadInt2();
var p = new Point(x, y);
pArray[i] = p;
}
foreach (var indexArray in MathLibrary.GetCombinationIndexCollection(N, 3))
{
var p0 = pArray[indexArray[0]];
var p1 = pArray[indexArray[1]];
var p2 = pArray[indexArray[2]];
var area = Point.CalcTriangleArea(p0 - p1, p0 - p2);
if (area == 0)
{
Console.WriteLine(IOLibrary.YesOrNo(true));
return;
}
}
Console.WriteLine(IOLibrary.YesOrNo(false));
}
public static void BlockOnGrid()
{
var(H, W) = IOLibrary.ReadInt2();
var min = int.MaxValue;
var A = new int[H][];
for (var row = 0; row < H; row++)
{
A[row] = IOLibrary.ReadIntArray();
for (var col = 0; col < A[row].Length; col++)
{
var num = A[row][col];
if (num < min)
{
min = num;
}
}
}
var sum = 0L;
for (var row = 0; row < H; row++)
{
for (var col = 0; col < W; col++)
{
sum += A[row][col] - min;
}
}
Console.WriteLine(sum);
}
public static void Creampuff()
{
var N = IOLibrary.ReadLong();
var list = MathLibrary.GetDivisorSortedList(N);
IOLibrary.OutputList(list);
}
public static void UnluckySeven()
{
var N = IOLibrary.ReadInt();
var count = 0;
for (var num = 1; num <= N; num++)
{
//10進数
if (num.ToString().Contains("7"))
{
count++;
}
else
{
//8進数
if (num.ToOct().Contains("7"))
{
count++;
}
}
}
var ans = N - count;
Console.WriteLine(ans);
}
public static void ReversibleCards()
{
var N = IOLibrary.ReadInt();
var abArray = IOLibrary.ReadInt2DArray(N);
var max = 400000;
var sum = new int[max];
var ans = 0;
for (var i = 0; i < N; i++)
{
var(a, b) = IOLibrary.ReadInt2();
if (sum[a] == 0)
{
ans++;
}
else if (sum[b] == 0)
{
ans++;
}
}
Console.WriteLine(ans);
}
public static void Billiard()
{
var(Sx, Sy, Gx, Gy) = IOLibrary.ReadLong4();
var y0 = (Sx * Gy + Sy * Gx) / (Sy + Gy);
Console.WriteLine(y0);
}
public static void TwoSequences2()
{
var N = IOLibrary.ReadInt();
var a = IOLibrary.ReadLongArray();
var b = IOLibrary.ReadLongArray();
var maxA = a[0];
var maxC = a[0] * b[0];
for (var j = 0; j < N; j++)
{
for (var i = Math.Max(0, j - 1); i <= j; i++)
{
if (a[i] > maxA)
{
maxA = a[j];
}
}
var c = maxA * b[j];
if (c > maxC)
{
maxC = c;
}
Console.WriteLine(maxC);
}
}
public static void Travel()
{
var(N, K) = IOLibrary.ReadInt2();
var T = IOLibrary.ReadInt2DArray(N);
var indexList = MathLibrary.GetPermutationIndex(Enumerable.Range(1, N - 1).ToArray());
var count = 0;
foreach (var index in indexList)
{
var sumTime = 0;
//末尾に終点0を追加
var newIndexList = index.Concat(new int[] { 0 });
var beforePoint = 0;
foreach (var currentIndex in newIndexList)
{
var time = T[beforePoint][currentIndex];
sumTime += time;
beforePoint = currentIndex;
}
if (sumTime == K)
{
count++;
}
}
Console.WriteLine(count);
}
public static void Lottery()
{
var n = IOLibrary.ReadInt();
var m = IOLibrary.ReadInt();
var x = IOLibrary.ReadIntArray().Sort().ToArray();
var cdArray = new int[n * n];
for (var c = 0; c < n; c++)
{
for (var d = 0; d < n; d++)
{
cdArray[c * d + d] = c + d;
}
}
for (var a = 0; a < n; a++)
{
for (var b = 0; b < n; b++)
{
var xd = m - x[a] + x[b];
var d = x.BinarySearch(xd);
if (d >= 0)
{
Console.WriteLine(IOLibrary.YesOrNo(true));
}
}
}
Console.WriteLine(IOLibrary.YesOrNo(false));
}
public static void WaterHeater()
{
var(N, W) = IOLibrary.ReadLong2();
var S = new long[N];
var T = new long[N];
var P = new long[N];
for (var i = 0; i < N; i++)
{
(S[i], T[i], P[i]) = IOLibrary.ReadLong3();
}
var maxTime = T.Max();
var table = new long[maxTime + 2];
for (var i = 0; i < N; i++)
{
table[S[i]] += P[i];
table[T[i]] -= P[i];
}
//集計
for (var i = 0; i < table.Length; i++)
{
table[i + 1] += table[i];
if (table[i] > W)
{
Console.WriteLine(IOLibrary.YesOrNo(false));
return;
}
}
Console.WriteLine(IOLibrary.YesOrNo(true));
}
public static void Coins()
{
var A = IOLibrary.ReadInt();
var B = IOLibrary.ReadInt();
var C = IOLibrary.ReadInt();
var X = IOLibrary.ReadInt();
var count = 0;
for (var a = 0; a <= A; a++)
{
for (var b = 0; b <= B; b++)
{
for (var c = 0; c <= C; c++)
{
var total = 500 * a + 100 * b + 50 * c;
if (total == X)
{
count++;
}
}
}
}
Console.WriteLine(count);
}
public static void Alphabet()
{
var a = IOLibrary.ReadLine();
var ans = char.IsUpper(a[0]) ? "A" : "a";
Console.WriteLine(ans);
}