Submission #19868

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
19868	2016-02-25 06:24:41	yongwhan	괄호 (kriii4_R)	C++14	100 / 100	912 ms	17336 KiB

R

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#include<bits/stdc++.h>
using namespace std;
const int mod=1e9+7;
const int mx=1e6+5;
typedef long long ll;
ll fact[mx], f[mx];
ll exp(ll a, ll b, ll m) {
  ll r=1;
  while(b) {
    if(b%2) r=(r*a)%m;
    a=(a*a)%m;
    b/=2;
  }
  return r;
}
ll inv(ll a, ll m) {
  return exp(a,m-2,m);
}
int binom(int n, int m, int mod) {
  ll a=fact[n], b=fact[m], c=fact[n-m];
  ll ret=a*inv(b,mod);
  ret%=mod;
  ret*=inv(c,mod);
  ret%=mod;
  return ret;
 
 
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• Subtask 1: 8 / 8
• Subtask 2: 92 / 92