fork download
copy 
  1. #include       <bits/stdc++.h>
  2. /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
  3. #define           el   '\n'
  4. #define           fi   first
  5. #define           se   second        
  6. #define           ll   long long
  7. #define           pb   push_back
  8. #define           pf   push_front
  9. /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/         
  10.  
  11. using namespace std; 
  12.  
  13. signed main()
  14. {
  15.  
  16.     ios_base::sync_with_stdio(false);  cin.tie(0); cout.tie(0); 
  17.  
  18.     int n, k; cin >> n >> k;
  19.     int p[n+1][n+1]; 
  20.  
  21.     for (int i=0; i<=n; i++) p[i][0] = p[0][i] = 0;
  22.  
  23.     for (int i=1; i<=n; i++)
  24.         for (int j=1; j<=n; j++) {
  25.             int x; cin >> x;
  26.             p[i][j] = p[i][j-1] + p[i-1][j] - p[i-1][j-1] + x;
  27.         }
  28.  
  29.     int res = 0;
  30.  
  31.     for (int i=k; i<=n; i++)
  32.         for (int j=k; j<=n; j++)
  33.             res = max(res, p[i][j] - p[i-k][j] - p[i][j-k] + p[i-k][j-k]);
  34.  
  35.     cout << res; 
  36.  
  37.  
  38.  
  39.    return (0 ^ 0);
  40. }
Success #stdin #stdout 0.01s 5300KB
comments (?)
stdin
copy 
4 3
1 9 1 1 
9 9 9 9
9 9 9 9
14 9 9 1
stdout
copy 
86
https://ideone.com/uoKdzo
language:
C++14 (gcc 8.3)
created:
2 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!