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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int arr[]= {3,1,2,3,2};
  6. 	int n=sizeof(arr)/sizeof(arr[0]);
  7. 	int k=2;
  8. 	bool flag=false;
  9. 	unordered_map<int, int> mp;
  10. 	for(int i=0;i<n;i++){
  11. 		if(mp.find(arr[i])!=mp.end()){
  12. 			int index=mp[arr[i]];
  13. 			if(i-index<=k){
  14. 				flag=true;
  15. 				break;
  16. 			}
  17. 		}
  18. 		mp[arr[i]]=i;
  19. 	}
  20. 	if(flag)
  21. 		cout<<"yes";
  22. 	else
  23. 		cout<<"no";
  24. 	return 0;
  25. }
  26.  
  27.  
Success #stdin #stdout 0.01s 5288KB
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stdin
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Standard input is empty
stdout
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yes
https://ideone.com/QoVxSj
language:
C++ (gcc 8.3)
created:
1 hour ago
visibility:
public

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