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  1. #include <iostream>
  2. using namespace std;
  3. #include <bits/stdc++.h>
  4. int main() {
  5. 	// your code goes here
  6. 	int  n;
  7. 	cin>>n;
  8. 	int arr[n];
  9. 	int i=0;
  10. 	while(i<n)
  11. 	 {
  12. 	 	cin>>arr[i];
  13. 	 	i++;
  14. 	 }
  15.  
  16.  
  17. 	 int count=0;
  18.  
  19. 	 for(int i=0;i<n;i++)
  20. 	   {
  21. 	   	for(int j=i+1;j<n;j++) 
  22. 	   	 {
  23. 	   	 	for(int k=j+1;k<n;k++)
  24. 	   	 	 {
  25. 	   	 	 	for(int l=k+1;l<n;l++)
  26. 	   	 	 	 {
  27. 	   	 	 	 	if(arr[i]+arr[j]+arr[k]+arr[l]==0)
  28. 	   	 	 	 	 count++;
  29. 	   	 	 	 }
  30. 	   	 	 }
  31. 	   	 }
  32. 	   }
  33. 	   cout<<count;
  34.  
  35. 	return 0;
  36. }
Success #stdin #stdout 0s 5284KB
comments (?)
stdin
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7
1 2 3 4 -1 -2 -2
stdout
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3
https://ideone.com/xA2KCn
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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