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  1. #include <bits/stdc++.h>
  2. #define F first
  3. #define S second
  4. using namespace std;
  5.  
  6. typedef pair<int, int> pii;
  7. typedef long long ll;
  8.  
  9. int a[500][500];
  10.  
  11. int f(int p, int q, int i, int j, int s) {
  12. 	int ans = min(p - i + 1, q - j + 1);
  13. 	ans = min(ans, 2*s - (p - i + 1));
  14. 	ans = min(ans, 2*s - (q - j + 1));
  15. 	return ans;
  16. }
  17.  
  18. bool inside(int x, int y, int n, int m) {
  19. 	return (x >= 1 and y >= 1 and x <= n and y <= m);
  20. }
  21.  
  22. int main() {
  23. 	int t, i, j, n, m, k, s;
  24. 	scanf("%d", &t);
  25. 	while(t--) {
  26. 		scanf("%d %d %d", &n, &m, &k);
  27. 		for(i = 1; i <= n; ++i)
  28. 			for(j = 1; j <= m; ++j)
  29. 				scanf("%d", &a[i][j]);
  30. 		int ans = 0;
  31. 		for(i = 1; i <= n; ++i)
  32. 			for(j = 1; j <= m; ++j) {
  33. 				for(s = ans + 1; inside(i + 2*s - 1 - 1, j + 2*s - 1 - 1, n, m); ++s) {
  34. 					bool ok = true;
  35.                     int x = 0;
  36. 					for(int p = i; p <= i + 2*s - 2; ++p) {
  37. 						for(int q = j; q <= j + 2*s - 2; ++q) {
  38. 							int r = f(p, q, i, j, s);
  39.                             if(a[p][q] > r) {
  40. 								ok = false;
  41. 								break;
  42. 							}
  43. 							x += (r - a[p][q]);
  44. 						}
  45. 						if(!ok)	break;
  46. 					}
  47. 					if(ok and x <= k)	ans = max(ans, s);
  48.                     else if(ok) break;
  49. 				}
  50. 			}
  51. 		cout << ans << endl;
  52. 	}
  53. 	return 0;
  54. }
Runtime error #stdin #stdout 0.86s 16216KB
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https://ideone.com/k6yG4z
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
secret

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