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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4. #define int long long
  5. #define yes cout << "YES\n";
  6. #define no cout << "NO\n";
  7.  
  8.  
  9. void FastIO(){
  10.     ios_base::sync_with_stdio(false);
  11.     cin.tie(nullptr);
  12.     cout.tie(nullptr);
  13. }
  14. /// Sub grids
  15. void solve(){
  16.     int w,h,n;
  17.     cin >> w >> h >> n;
  18.  
  19. 	vector<vector<int>> board(w+2, vector<int>(h+2,0));
  20.  
  21. 	while(n--){
  22. 		int x1,y1;
  23. 		cin >> x1 >> y1;
  24.  
  25. 		int x2,y2;
  26. 		cin >> x2 >> y2;
  27.  
  28.         int val1 = min(x1,x2); //x1
  29.         int val2 = min(y1,y2); //y1
  30.         int val3 = max(x1,x2); //x2
  31.         int val4 = max(y1,y2); //y2
  32.  
  33. 		board[val1][val2] += 1;
  34. 		board[val1][val4+1] -= 1;
  35. 		board[val3+1][val2] -= 1;
  36. 		board[val3+1][val4+1] += 1;
  37. 	}
  38.  
  39. 	for(int i = 1; i <= w; i++){
  40. 		for(int j = 1; j <= h; j++){
  41. 			board[i][j] += board[i][j-1];
  42. 		}
  43. 	}
  44.  
  45. 	for(int i = 1; i <= w; i++){
  46. 		for(int j = 1; j <= h; j++){
  47. 			board[i][j] += board[i-1][j];
  48. 		}
  49. 	}
  50.  
  51. 	int ans = 0;
  52.  
  53. 	for(int i = 1; i <= w; i++){
  54. 		for(int j = 1; j <= h; j++){
  55. 			if(board[i][j] == 0){
  56. 				ans++;
  57. 			}
  58. 		}
  59. 	}
  60.  
  61. 	cout << ans << '\n';
  62. }
  63.  
  64. signed main(){
  65.     FastIO();
  66.  
  67.     int t;
  68.     cin >> t;
  69.  
  70.     while(t--){
  71.         solve();
  72.     }
  73.     return 0;
  74. }
Success #stdin #stdout 0.01s 5272KB
comments (?)
stdin
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3
1 1 1
1 1 1 1
2 2 2
1 1 1 2
1 1 2 1
493 182 3
349 148 363 146
241 123 443 147
303 124 293 17
stdout
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0
1
83470
https://ideone.com/ZNa8Lt
Sub-Grids
language:
C++14 (gcc 8.3)
created:
3 hours ago
visibility:
public

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