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  1. #include <iostream>
  2. #include<vector>
  3. using namespace std;
  4.  
  5. int main() {
  6.  
  7.  
  8. 	int count = 0,m = 0;
  9. 	int n,flag;
  10. 	cin >> n;
  11. 	vector<int> a(n,0);
  12.  
  13. 	for(int i = 0;i < n;i++){
  14. 		cin >> a[i];
  15. 	}
  16.  
  17. 	flag = 1;
  18.  
  19. 	while(flag){
  20.  
  21. 		if(a[m] != 2){
  22. 			m = a[m];
  23. 			count++;
  24. 		}
  25.  
  26. 		if(a[m] == 2){
  27. 			flag = 0;
  28. 		}
  29.  
  30. 	}
  31.  
  32. 	cout << count << endl;
  33.  
  34.  
  35.  
  36. 	return 0;
  37. }
Runtime error #stdin #stdout 0s 15224KB
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stdin
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5
3
3
4
2
4
stdout
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Standard output is empty
https://ideone.com/8Ml7Hp
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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