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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
stdin
Standard input is empty
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