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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	// your code goes here
  6. 	string a;
  7. 	cin>>a;
  8. 	set<char>st;
  9. 	int end,start=0,mxl=INT_MIN;
  10. 	for(end=0;end<a.length();end++)
  11. 	{
  12. 		while(st.find(a[end])!=st.end())
  13. 		{
  14. 			st.erase(a[start]);
  15. 			start++;
  16. 		}
  17. 		st.insert(a[end]);
  18. 		mxl=max(mxl,end-start+1);
  19.  
  20. 	}
  21. 	cout<<mxl;
  22. 	return 0;
  23. }
Success #stdin #stdout 0s 4472KB
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stdin
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ABCEBDABC
stdout
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5
https://ideone.com/qDUQ94
language:
C++ (gcc 8.3)
created:
3 years ago
visibility:
public

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