제출 #18991

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
18991	2016-02-17 02:47:19	kriii	흑백 (kriii4_G)	C++14	100 / 100	319 ms	9060 KiB

G

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#include <stdio.h>
const long long mod = 1000000007;
long long pow(long long a, long long p)
{
  a %= mod;
  p = (p % (mod - 1) + mod - 1) % (mod - 1);
  long long r = 1;
  while (p){
    if (p & 1) r = r * a % mod;
    a = a * a % mod;
    p /= 2;
  }
  return r;
}
long long inv2[1010],comb[1010][1010];
int main()
{
  inv2[0] = 1;
  for (int i=1;i<=1000;i++){
    inv2[i] = inv2[i-1] * 500000004 % mod;
  }
  for (int i=0;i<=1000;i++){
    comb[i][0] = comb[i][i] = 1;
    for (int j=1;j<i;j++) comb[i][j] = (comb[i-1][j-1] + comb[i-1][j]) % mod;
  }
 
 
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• Subtask 1: 6 / 6
• Subtask 2: 94 / 94