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  1. #include<iostream>
  2. #include<queue>
  3. using namespace std;
  4.  
  5.  
  6. int main() {
  7. 	int n;
  8. 	cin >> n; // 1 to 2e5
  9.  
  10. 	queue<int> q;
  11.  
  12. 	for(int i = 1; i <= n; i++) {
  13. 		q.push(i);
  14. 	}
  15.  
  16. 	while(!q.empty()) {
  17. 		q.push(q.front());
  18. 		q.pop();
  19. 		cout << q.front() << ' ';
  20. 		q.pop();
  21. 	}
  22. 	cout << '\n';
  23. 	return 0;
  24. }
  25.  
Success #stdin #stdout 0.01s 5324KB
comments (?)
stdin
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7
stdout
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2 4 6 1 5 3 7
https://ideone.com/hGRh2b
language:
C++ (gcc 8.3)
created:
3 days ago
visibility:
public

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