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  1. #include <bits/stdc++.h>
  2.  
  3. #define rd freopen("input.txt", "r", stdin)
  4. #define rw freopen("output.txt", "w", stdout)
  5. #define gg ios_base::sync_with_stdio(0)
  6.  
  7. using namespace std;
  8.  
  9. long long t, n, m, x, v, ar[100100], as[100100], t1, t2, res;
  10.  
  11. int main() {
  12. 	gg;
  13. 	//rd;
  14.  
  15. 	cin >> t;
  16. 	while (t--) {
  17. 		res = 0;
  18. 		cin >> n >> m >> x;
  19.  
  20. 		memset(ar, 0, sizeof(ar));
  21. 		memset(as, 0, sizeof(as));
  22.  
  23. 		for (int i = 0; i < n; i++) {
  24. 			cin >> v;
  25. 			v = v%m;
  26. 			ar[v]++;
  27. 		}
  28. 		as[0] = 0;
  29. 		for (int i = 1; i < m; i++) {
  30. 			as[i] = as[i - 1] + ar[i];
  31. 		}
  32. 		as[m] = as[m - 1] + ar[0];   
  33.  
  34. 		for (int i = 0; i < m; i++) {
  35. 			if (i<=x) { 
  36. 				res += as[x - i]*ar[i];
  37. 				res += (as[m] - as[m - i - 1])*ar[i];
  38. 			}
  39. 			else { 
  40. 				res += (as[m + x - i] - as[m - i - 1])*ar[i];
  41. 			} 
  42. 		}
  43. 		cout << res << endl;
  44. 	}
  45. }
Success #stdin #stdout 0s 5028KB
comments (?)
stdin 
2
3 5 3
1 2 3
4 7 4
31 12 11 17
stdout 
6
12
https://ideone.com/ti6xRi
language:
C++ (gcc 8.3)
created:
8 years ago
visibility:
public

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