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  1. #include <iostream>
  2. #include <cstdio>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	int t, n, x, b, s, min;
  7. 	scanf("%d", &t);
  8. 	while(t--) {
  9. 		scanf("%d %d", &n, &x);
  10. 		s=0; min=101;
  11. 		while(n--) { scanf("%d", &b); s=s+b; if(b<min) min=b; }
  12. 		if(min<=s%x) printf("-1\n");
  13. 		else printf("%d\n", s/x);
  14. 	}
  15. 	return 0;
  16. }
Success #stdin #stdout 0s 3300KB
comments (?)
stdin 
3
4 7
10 4 8 5
1 10
12
2 10
20 50
stdout 
-1
1
7
https://ideone.com/vgD2Hb
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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