fork download
copy 
  1. #include<bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main(){
  5. 	int t,n;	cin >> t;
  6. 	while(t--){
  7. 		cin >> n;
  8. 		vector<int> s(n);
  9. 		bool psble = true;
  10. 		for(int i=0;i<n;i++)	cin >> s[i];
  11. 		for(int i=1;i<n;i++){
  12. 			if(s[i-1] > s[i] && s[i-1] - s[i] > 1){
  13. 				psble = false;
  14. 				break;
  15. 			}else if(s[i] < s[i-1])	swap(s[i],s[i-1]);
  16. 		}
  17. 		//for(auto i : s)	cout << i << " ";
  18. 		psble ? cout << "YES\n" : cout << "NO\n";
  19. 	}
  20. 	return 0;
  21. }
  22.  
Success #stdin #stdout 0.01s 5276KB
comments (?)
stdin
copy 
2
4
2 1 3 4
4
4 3 2 1
stdout
copy 
YES
NO
https://ideone.com/ZVH8El
language:
C++14 (clang 8.0)
created:
5 days 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!