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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int gcd(int a, int b) {
  5.     return b == 0 ? a : gcd(b, a%b);
  6.   }
  7.  
  8. int main() {
  9. 	int n, m, sum;
  10. 	cin >> n;
  11. 	while(n-- > 0) {
  12. 		cin >> m; 
  13.         int ns[m];
  14.         for(int i = 0; i < m; i++) cin >> ns[i];
  15.         sum = 0;
  16.         for(int i = 0; i < m; i++) {
  17.             for(int j = i + 1; j < m; j++) sum += gcd(ns[i], ns[j]);
  18.         }
  19.         cout << sum << endl;
  20.     }
  21. }
Success #stdin #stdout 0s 4952KB
comments (?)
stdin 
4
4 5 6 7 8
4 8 6 2 9
3 2 15 6
5 12 25 29 19 11
stdout 
7
11
6
10
https://ideone.com/CDq3Bp
EOLIMP 6941
language:
C++ (gcc 8.3)
created:
4 years ago
visibility:
public

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