fork download
copy 
  1. #include <iostream>
  2. #include <cstdio>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	// your code goes here
  7. 	int t, k, a, b, flag;
  8. 	scanf("%d", &t);
  9. 	while(t--) {
  10. 		scanf("%d", &k);
  11. 		b=1; flag=0;
  12. 		while(k--) {
  13. 			scanf("%d", &a); if(a>b) {
  14. 				flag++; break;
  15. 			} b=(b-a)*2;
  16. 		}
  17. 		if(flag || b) printf("No\n");
  18. 		else printf("Yes\n");
  19. 	}
  20. 	return 0;
  21. }
Success #stdin #stdout 0s 3344KB
comments ()
stdin
copy 
3
3
0 1 2
3
0 0 3
5
0 1 1 1 2
stdout
copy 
Yes
No
Yes
https://ideone.com/MCNevO
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!