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  1. #include<iostream>
  2. using namespace std;
  3. int main(){
  4. 	int n;
  5. 	scanf("%d",&n);
  6. 	while(n!=0){
  7. 		int *a = new int[n+1];
  8. 		for(int i=1;i<=n;i++){
  9. 			scanf("%d",&a[i]);
  10. 		}
  11. 		bool cool =true;
  12. 		for(int i=1;i<=n;i++){
  13. 			if(a[a[i]]!=i){
  14. 				cool=false;
  15. 				printf("not ambiguous\n");
  16. 				break;
  17. 			}	
  18. 		}
  19. 		if(cool)
  20. 			printf("ambiguous\n");
  21. 		scanf("%d",&n);
  22. 	}
  23. 	return 0;
  24. }
  25.  
Time limit exceeded #stdin #stdout 5s 528384KB
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https://ideone.com/ZpiAvN
language:
C++ 4.3.2 (gcc-4.3.2)
created:
9 years ago
visibility:
public

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