結果
問題 | No.117 組み合わせの数 |
ユーザー | mkawa2 |
提出日時 | 2020-01-20 22:07:58 |
言語 | PyPy3 (7.3.15) |
結果 |
WA
|
実行時間 | - |
コード長 | 1,694 bytes |
コンパイル時間 | 147 ms |
コンパイル使用メモリ | 81,564 KB |
実行使用メモリ | 471,232 KB |
最終ジャッジ日時 | 2024-07-02 23:12:46 |
合計ジャッジ時間 | 3,153 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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ソースコード
import sys sys.setrecursionlimit(10 ** 6) def II(): return int(sys.stdin.readline()) class mint: def __init__(self, x): self.__x = x % md def __str__(self): return str(self.__x) def __add__(self, other): if isinstance(other, mint): other = other.__x return mint(self.__x + other) def __sub__(self, other): if isinstance(other, mint): other = other.__x return mint(self.__x - other) def __rsub__(self, other): return mint(other - self.__x) def __mul__(self, other): if isinstance(other, mint): other = other.__x return mint(self.__x * other) __radd__ = __add__ __rmul__ = __mul__ def __truediv__(self, other): if isinstance(other, mint): other = other.__x return mint(self.__x * pow(other, md - 2, md)) def __pow__(self, power, modulo=None): return mint(pow(self.__x, power, md)) def nCr(com_n, com_r): if com_n < com_r: return 0 return fac[com_n] * ifac[com_r] * ifac[com_n - com_r] def nPr(com_n, com_r): if com_n < com_r: return 0 return fac[com_n] * ifac[com_n - com_r] def nHr(com_n, com_r): return nCr(com_n + com_r - 1, com_r) md = 10 ** 9 + 7 n_max = 10 ** 6 * 2 fac = [mint(1)] for i in range(1, n_max + 1): fac.append(fac[-1] * i) ifac = [1] * (n_max + 1) ifac[n_max] = fac[n_max] ** (md - 2) for i in range(n_max - 1, 1, -1): ifac[i] = ifac[i + 1] * (i + 1) def main(): t = II() for _ in range(t): s = input() op = s[0] n, r = map(int, s[2:-1].split(",")) if op == "C": print(nCr(n, r)) if op == "P": print(nPr(n, r)) if op == "H": print(nHr(n, r)) main()