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  1.     #include <stdio.h>
  2.     #include <string.h>
  3.     #include <iostream>
  4.     #include <string>
  5.     #include <algorithm>
  6.     #include <map>
  7.     #include <vector>
  8.     using namespace std;
  9.     #define ll long long
  10.     #define MAX 1000100
  11.  
  12.     int n;
  13.     ll mod;
  14.  
  15.     void input(){
  16.     	scanf("%d", &n);
  17.     }
  18.  
  19.     ll mul(ll a,ll b){
  20.     	if(b == 0) return 0;
  21.     	if(b == 1) return a % mod;
  22.     	ll m = mul(a, b / 2);
  23.     	m = (m + m) % mod;
  24.     	if(b & 1) m = (m + a) % mod;
  25.     	return m;
  26.     }
  27.  
  28.     void process(){
  29.     	if(n >= 587117){
  30.     		printf("0");
  31.     		return;
  32.     	}
  33.     	ll ans = 1, gt = 1;
  34.         mod = 109546051211;
  35.     	for(ll i = 1; i <= n; i++){
  36.     		gt = mul(gt, i);
  37.     		ans = mul(ans, gt);
  38.     	}
  39.     	printf("%lld", ans);
  40.     }
  41.  
  42.     int main(){
  43.     	//freopen("in.txt", "r", stdin);
  44.     	input();
  45.     	process();
  46.     	return 0;
  47.     }
Success #stdin #stdout 0s 3464KB
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https://ideone.com/Pv3efT
language:
C++ (gcc 8.3)
created:
8 years ago
visibility:
public

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