Submission #1238858

#	Time	Username	Problem	Language	Result	Execution time	Memory
1238858		simplemind_31	Catfish Farm (IOI22_fish)	C++20	0 / 100	25 ms	4164 KiB

fish

#include "fish.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
ll mat[305][305],psum[305][305],dp[305][305];
ll max_weights(int N,int M,vector<int> X,vector<int> Y,vector<int> W){
  for(int i=0;i<M;i++){
    mat[Y[i]+1][X[i]+1]=W[i];
  }
  for(int i=1;i<=N;i++){
    for(int j=1;j<=N;j++){
      psum[i][j]=mat[i][j]+psum[i-1][j];
    }
  }
  for(int j=1;j<=N;j++){
    dp[0][j]=dp[N][j-1];
    for(int i=1;i<=N;i++){
      // no usar i,j
      dp[i][j]=dp[i-1][j];
      //usar i,j;
      for(int k=0;k<=N;k++){
        if(k<=i){
            dp[i][j]=max(dp[i][j],dp[k][j-1]-psum[k][j]+psum[i][j-1]-psum[k][j-1]+psum[i][j+1]);
        }else{
            dp[i][j]=max(dp[i][j],dp[k][j-1]-psum[i][j]+psum[i][j+1]);
        }
      }
      if(j>=2){
        for(int k=0;k<=N;k++){
          if(k<=i){
              dp[i][j]=max(dp[i][j],dp[k][j-2]+psum[i][j-1]-psum[k][j-1]+psum[i][j+1]);
          }else{
              dp[i][j]=max(dp[i][j],dp[k][j-2]+psum[i][j+1]);
          }
        }
        if(j>=3){
          dp[i][j]=max(dp[i][j],dp[N][j-3]+psum[i][j-1]+psum[i][j+1]);
        }
      }
    }
  }
  return dp[N][N];
}

• Subtask 1: 0 / 3
• Subtask 2: 0 / 6
• Subtask 3: 0 / 9
• Subtask 4: 0 / 14
• Subtask 5: 0 / 21
• Subtask 6: 0 / 17
• Subtask 7: 0 / 14
• Subtask 8: 0 / 16