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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int n;
  6. 	cin >> n;
  7. 	int smallest = 0, biggest = n + 1, x;
  8. 	for (int i = 1; i < n; ++i) {
  9. 		cin >> x;
  10. 		if (biggest - x >= smallest) {
  11. 			biggest = x;
  12. 		} else {
  13. 		    smallest = x;
  14. 		}
  15. 	}
  16. 	if (biggest - smallest >= 2 || smallest - biggest >= 2) {
  17. 		if (biggest > smallest) {
  18. 			cout << smallest + 1;
  19. 		} else {
  20. 			cout << biggest + 1;
  21. 		}
  22.  
  23. 	} else if (smallest == 0) {
  24. 		cout << n;
  25. 	} else {
  26. 	    cout << 1;
  27. 	}
  28. }
Success #stdin #stdout 0s 5308KB
comments (?)
stdin 
5
1 2 3 4
stdout 
2
https://ideone.com/vJYhGe
language:
C++14 (gcc 8.3)
created:
4 hours ago
visibility:
public

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