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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. vector<int> arr={1,3,4,5,8};
  6. int n=arr.size();
  7. int i=0, j=n-1 , count=0 ,k=5;
  8. while(i<j){
  9. 	if(arr[i]+arr[j]<=k){
  10. 		i++;
  11. 	}else{
  12. 		count=count+j-i;
  13. 		j--;
  14. 	}
  15.  
  16. }
  17. cout<<count<<endl;
  18. 	return 0;
  19. }
Success #stdin #stdout 0s 5320KB
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Standard input is empty
stdout
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8
https://ideone.com/QB3EJV
language:
C++14 (gcc 8.3)
created:
6 hours ago
visibility:
public

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