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  1. #include <bits/stdc++.h>
  2. #define ll long long int
  3. using namespace std;
  4.  
  5. int main() {
  6. 	// your code goes here
  7. 	int t;
  8.     scanf("%d",&t);
  9. 	while(t-->0){
  10. 		int n;
  11. 		scanf("%d",&n);
  12. 		ll a[n];
  13. 		int m[n];
  14. 		bool k = true;
  15. 		for(int i = 0;i<n;i++){scanf("%lli",&a[i]);m[i] = 0;}
  16. 		for(int i =0;i<n-1;i++){
  17. 			if(a[i]>a[i+1] && m[i+1] == 1){
  18. 				k = false;
  19. 				break;
  20. 			}
  21. 			else if(a[i]>a[i+1]){
  22. 				swap(a[i],a[i+1]);
  23. 				m[i+1] = 1;
  24. 			}
  25. 		}
  26. 		for(int i =0;i<n-1;i++){
  27. 			if(a[i]>a[i+1]){
  28. 				k = false;
  29. 				break;
  30. 			}
  31. 		}
  32. 		if(k)cout<<"YES"<<endl;
  33. 		else cout<<"NO"<<endl;
  34. 	}
  35. 	return 0;
  36. }
Success #stdin #stdout 0s 3460KB
comments (?)
stdin
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2
3
1 2 3
5
2 4 1 3 5
stdout
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YES
NO
https://ideone.com/Irpezf
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
secret

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