fork download
copy 
  1. #include <iostream>
  2. #include<climits>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	int n;
  7. 	cin>>n;
  8.  
  9. 	int a[n];
  10. 	for(int i=0; i<n; i++){
  11. 		cin>>a[i];
  12. 	}
  13.  
  14. 	int N=10000;
  15. 	int b[N];
  16. 	for(int i=0; i<N; i++){
  17. 		b[i]=-1;
  18. 	}
  19.  
  20. 	int mn=INT_MAX;
  21.  
  22. 	for(int i=0; i<n; i++){
  23. 		if(b[a[i]]!=-1){
  24. 			mn=min(mn,b[a[i]]);
  25. 		}
  26. 		else{
  27. 			b[a[i]]=i;
  28. 		} 
  29. 	}
  30.  
  31. 	if(mn==INT_MAX){
  32. 		cout<<"-1";
  33. 	}
  34. 	else{
  35. 	cout<<mn+1;
  36. 	}
  37. 	return 0;
  38. }
Success #stdin #stdout 0s 5432KB
comments (?)
stdin
copy 
7
1 5 3 4 3 5 6
stdout
copy 
2
https://ideone.com/pUhMFf
language:
C++ (gcc 8.3)
created:
2 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!