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  1. #include <iostream>
  2. #include<vector>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	int q,t1,t2;
  7. 	vector<int> v;
  8. 	scanf("%d",&q);
  9. 	while(q--){
  10. 		if(cin >> t1>>t2){
  11. 			if(t1==0)
  12. 			{
  13. 				v.push_back(t2);
  14. 			}
  15. 			else if(t1==1)
  16. 			{
  17. 				cout << v[t2] <<"\n";
  18. 			}
  19. 		}
  20. 		else if(cin >> t1){
  21. 			if(t1==2)
  22. 			v.pop_back();
  23. 		}
  24.  
  25. 	}
  26. 	return 0;
  27. }
  28.  
Success #stdin #stdout 0s 4364KB
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stdin
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8
0 1
0 2
0 3
2
0 4
1 0
1 1
1 2
stdout
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2
https://ideone.com/Q5Pn1H
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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