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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int n;
  6. 	cin >> n;
  7. 	int a[n], b[n], c[n], d[n], e[n];
  8. 	for(int i = 0; i < n; i++)
  9. 	cin >> a[i];
  10. 	for(int i = 0; i < n; i++)
  11. 	cin >> b[i];
  12. 	for(int i = 0; i < n; i++)
  13. 	cin >> c[i];
  14. 	for(int i = 0; i < n; i++)
  15. 	cin >> d[i];
  16. 	for(int i = 0; i < n; i++)
  17. 	cin >> e[i];
  18.  
  19. 	unordered_map<int,int> mp;
  20. 	for(int l = 0; l < n; l++){
  21. 		for(int m = 0; m < n; m++){
  22. 			mp[d[l]+e[m]]++;
  23. 		}
  24. 	}
  25. 	int cnt = 0;
  26. 	for(int i = 0; i < n; i++){
  27. 		for(int j = 0; j < n; j++){
  28. 			for(int k = 0; k < n; k++){
  29. 				int sum = a[i]+b[j]+c[k];
  30. 				int req = -1*sum;
  31. 				if(mp.find(req) != mp.end()){
  32. 					cnt += mp[req];
  33. 				}
  34. 			}
  35. 		}
  36. 	}
  37. 	cout << cnt;
  38. 	return 0;
  39. }
Success #stdin #stdout 0s 5312KB
comments (?)
stdin
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2
2 5
3 8
-5 8
5 10
-10 100
stdout
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2
https://ideone.com/Aw1ecV
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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