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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. int main(){
  4.  
  5. 	string s;
  6. 	cin>>s;
  7. 	int l=0;
  8. 	int r=0;
  9. 	int max1=0;
  10. 	vector<int>v(256,0);
  11. 	if(s.size()==0){
  12. 		cout<<0;
  13. 	}
  14. 	else if(s.size()==1){
  15. 		cout<<1;
  16. 	}
  17. 	else{
  18. 		while(r < s.size()){
  19. 			 while(v[s[r]] == 1){
  20. 			 	  v[s[l]]=0;
  21. 			 	  l++;
  22. 			 }
  23. 			 v[s[r]]=1;
  24. 			 max1=max(max1,r-l+1);
  25. 			 r++;
  26. 		}
  27. 		cout<<max1;
  28. 	}
  29. 	return 0;
  30. }
Success #stdin #stdout 0.01s 5288KB
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“GEEKSFORGEEKS”
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https://ideone.com/rCjVzv
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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