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  1. #include <stdio.h>
  2. #include <math.h>
  3. #include <string.h>
  4.  
  5. int main()
  6. {
  7.     int t;
  8. 	scanf("%d", &t);
  9.  
  10. 	while (t--) {
  11. 		int n, i, j;
  12. 		scanf("%d", &n);
  13. 		long int arr[n], mini, maxi;
  14. 		char str[105];
  15.  
  16. 		/*if (n == 1) {
  17. 			scanf("%ld", &x);
  18. 			printf("0\n");
  19. 			continue;
  20. 		}*/
  21.  
  22. 		for (i = 0;i < n;i++) {
  23. 			str[i] = '0';
  24. 			scanf("%ld", &arr[i]);
  25. 		}
  26.  
  27. 		//printf("%s\n", str);
  28.  
  29. 		for (i = 0;i < n;i++) {
  30. 			for (j = 0;j < n;j++) {
  31. 				mini = fmin(arr[i], arr[j]);
  32. 				maxi = fmax(arr[i], arr[j]);
  33. 				if ((maxi == 2 * mini) && (str[i] == '0' && str[j] == '0')) {
  34. 					str[i] = str[j] = '1';
  35. 					break;
  36. 				}
  37. 			}
  38. 		}
  39.  
  40. 		//printf("%s\n", str);
  41.  
  42. 		long int cnt = 0;
  43. 		for (i = 0;i < n;i++) {
  44. 			if (str[i] == '1') {
  45. 				cnt++;
  46. 			}
  47. 		}
  48.  
  49. 		printf("%ld\n", cnt / 2);
  50.  
  51. 	}
  52. 	return 0;
  53. }
Runtime error #stdin #stdout 0.02s 2252KB
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https://ideone.com/IhCvWO
language:
C (gcc 8.3)
created:
12 years ago
visibility:
secret

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