Submission #211271

#	Time	Username	Problem	Language	Result	Execution time	Memory
211271		bash	Asceticism (JOI18_asceticism)	C++17	49 / 100	48 ms	24952 KiB

asceticism

#include<bits/stdc++.h>
using namespace std;
const int mod = 1e9 + 7;
int n,m;
int dp[3005][3005];
int add(int x, int y) {
  return ((x+y)%mod + mod)%mod;
}
int mul(int x, int y) {
  return ((1LL*x*y)%mod + mod)%mod;
}
int main() {
  scanf("%d%d",&n,&m);
  dp[1][1] = 1;
  for(int x=2;x<=n;x++) {
    for(int k=1;k<=m;k++) {
      dp[x][k] = add(mul(x-k+1, dp[x-1][k-1]), mul(k, dp[x-1][k]));
    }
  }
  printf("%d",dp[n][m]);
}

Compilation message (stderr)

asceticism.cpp: In function 'int main()':
asceticism.cpp:13:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&n,&m);
   ~~~~~^~~~~~~~~~~~~~

• Subtask 1: 4 / 4
• Subtask 2: 20 / 20
• Subtask 3: 25 / 25
• Subtask 4: 0 / 51