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  1.  
  2. #include <bits/stdc++.h>
  3. using namespace std;
  4. const int N = 25;
  5. int n,mat[N][N],dp[N][N];
  6. int cache[N];
  7. int solve(int row, int col){
  8.     if(dp[row][col]!=-1 && cache[col]==0)return dp[row][col];
  9.     ////////////////////////////////
  10.     if(row==n){
  11.         if(n==1)return mat[row][col];
  12.         for(int i=1; i<=n ;i++) if(cache[i]==0)return mat[row][i];
  13.     }
  14.     ////////////////////////////////
  15.     int best = 0;
  16.     for(int i=1; i<=n; i++){
  17.         if(cache[i]==0){
  18.             cache[i]=1;
  19.             best = max(best, solve(row+1,i));
  20.             cache[i]=0;
  21.         }
  22.         else{
  23.  
  24.         }
  25.     }
  26.     return dp[row][col]=(best+mat[row][col]);
  27. }
  28. int main() {
  29.     /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
  30.     int t;
  31.     scanf("%d",&t);
  32.     while(t--){
  33.         int i,j;
  34.         memset(dp, -1, sizeof dp);
  35.         scanf("%d",&n);
  36.         for(i=1; i<=n; i++){
  37.             for(j=1; j<=n; j++){
  38.                 scanf("%d",&mat[i][j]);
  39.             }
  40.         }
  41.         int ans = 0;
  42.         for(i=1; i<=n; i++){
  43.             cache[i]=1;
  44.             ans = max(ans,solve(1,i));
  45.             cache[i]=0;
  46.         }
  47.         cout<<ans<<"\n";
  48.     }
  49.     return 0;
  50. }
  51.  
Success #stdin #stdout 0s 16064KB
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https://ideone.com/CeaGnM
language:
C++ (gcc 8.3)
created:
7 years ago
visibility:
secret

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