Submission #995549

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
995549	2024-06-09 10:32:03	mariamp1	Tents (JOI18_tents)	C++14	100 / 100	50 ms	70788 KiB

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#include<bits/stdc++.h>
using namespace std;
#define int long long
const int N = 3005;
int dp[3005][3005];
const int mod = 1e9 + 7;
int32_t main(){
  int h, w; cin >> h >> w;
  int ans = 0;
  for(int i = 1; i <= h; i++){
    for(int j = 1; j <= w; j++){
      ans=0;
      ans += dp[i-1][j];
      if(j > 1){
        ans += (j * (j-1))/2 * (dp[i-1][j-2]+1);
      }
      ans += (dp[i-1][j-1]+1) * j * 4;
      if(i > 1){
        ans += (dp[i-2][j - 1] + 1) * (i-1) * (j);
      }
      ans %= mod;
      dp[i][j]=ans;
    }
  }
  cout << ans << endl;
}
 
 
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• Subtask 1: 48 / 48
• Subtask 2: 52 / 52