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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	long long int n, i; cin >> n;
  6. 	vector<long long int> num;
  7. 	for(i=0; i<n; i++){
  8. 		long long int x; cin >> x;
  9. 		num.push_back(x);
  10. 	}
  11. 	sort(num.begin(), num.end());
  12. 	for(i=0; i<n; i++){
  13. 		if(num[i]!=i+1){
  14. 			cout << i+1;
  15. 			break;
  16. 		}
  17. 	}
  18. 	return 0;
  19. }
Success #stdin #stdout 0.01s 5424KB
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https://ideone.com/mVleSL
language:
C++14 (gcc 8.3)
created:
2 years ago
visibility:
public

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