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  1. #include<stdio.h>
  2. #include<stdlib.h>
  3. int main(){
  4.     int t,q;
  5. 	scanf("%d" , &t);
  6. 	long long int n;
  7. 	for(q=0;q<t;q++){
  8. 		scanf("%lld" , &n);
  9. 		int i;
  10. 		for(i=0;i<7;i++){
  11. 			n-=4*i;
  12. 			if(n%7==0)
  13. 				break;
  14. 		}
  15. 		if(n<0)printf("-1\n");
  16. 		else
  17. 			printf("%lld\n" , n);
  18. 	}
  19. 	return 0;
  20. }
Success #stdin #stdout 0s 2900KB
comments (?)
stdin
copy 
5
7
4
11
1
15
stdout
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7
0
7
-1
-1
https://ideone.com/0tTZeE
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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