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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int n,d;
  6. 	cin>>n>>d;
  7.  
  8. 	vector<int> numbers(n);
  9.  
  10. 	for(auto& number: numbers){
  11. 		cin>>number;
  12. 	}
  13.  
  14. 	int answer = 0;
  15.  
  16. 	for(int i=0; i<n; i++){
  17. 		for(int j=i+1; j<n; j++){
  18. 			for(int k=j+1; k<n; k++){
  19. 				int sum = numbers[i] + numbers[j] + numbers[k];
  20.  
  21. 				if(sum%d==0)answer++;
  22. 			}
  23. 		}
  24. 	}
  25.  
  26. 	cout<<answer;
  27.  
  28. 	return 0;
  29. }
Success #stdin #stdout 0s 5328KB
comments (?)
stdin
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5 5
3 3 4 7 8
stdout
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3
https://ideone.com/9NIpmQ
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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