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  1. #include<iostream>
  2. using namespace std;
  3. void printSumTricky(int mat[][500], int k,int m,int n)
  4. {
  5.     int stripSum[500][500];
  6.     for (int j = 0; j < n; j++)
  7.     {
  8.         int sum = 0;
  9.         for (int i = 0; i < k; i++)
  10.             sum += mat[i][j];
  11.         stripSum[0][j] = sum;
  12.         for (int i = 1; i < m - k + 1; i++)
  13.         {
  14.             sum += (mat[i + k - 1][j] - mat[i - 1][j]);
  15.             stripSum[i][j] = sum;
  16.         }
  17.     }
  18.     for (int i = 0; i < m - k + 1; i++)
  19.     {
  20.         int sum = 0;
  21.         for (int j = 0; j < k; j++)
  22.             sum += stripSum[i][j];
  23.         cout << sum/(k*k) << "  ";
  24.         for (int j = 1; j < n - k + 1; j++)
  25.         {
  26.             sum += (stripSum[i][j + k - 1] - stripSum[i][j - 1]);
  27.             cout << sum/(k*k) << "  ";
  28.         }
  29.  
  30.         cout << endl;
  31.     }
  32. }
  33. int main() {
  34. 	int t; cin >> t;
  35. 	while (t--) {
  36. 		int m, n, k;
  37. 		cin >> m >> n >> k;
  38. 		int M[500][500], N[500][500], X[500][500] = { 0 };
  39. 		for (int i = 0; i < m; i++) {
  40. 			for (int j = 0; j < n; j++)
  41. 				cin >> M[i][j];
  42. 		}
  43.         printSumTricky(M, k, m, n);
  44. 	}
  45. }
Success #stdin #stdout 0.01s 5272KB
comments (?)
stdin
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2

4 4 3

2 1 0 0

3 2 1 1

4 5 2 1

2 2 9 0

3 3 3

1 2 3

4 5 6

7 8 9
stdout
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2  1  
3  2  
5
https://ideone.com/wgnDmB
language:
C++14 (gcc 8.3)
created:
6 days ago
visibility:
public

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