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Longest_palindromic_substring.cpp
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Longest_palindromic_substring.cpp
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#include<bits/stdc++.h>
using namespace std;
class Solution {
public:
string longestPalindrome(string s) {
int max = 1,max_i=0 ;
for(int i=0;i<s.size();i++)
{
int l=i-1;
int r = i+1;
while(l>=0 && r<s.length())
{
if(s[l]==s[r])
{
if(max < (r-l+1))
{
max = r-l+1 ;
max_i= l;
}
l--;
r++;
}
else
break;
}
}
for(int i=0;i<s.size();i++)
{
int l=i;
int r = i+1;
while(l>=0 && r<s.size())
{
if(s[l]==s[r])
{
if(max < r-l+1)
{
max = r-l+1 ;
max_i= l;
}
l--;
r++;
}
else
break;
}
}
return s.substr(max_i,max);
}
};
int main(){
Solution s ;
string result= s.longestPalindrome("abababab");
cout<<result ;
return 0;
}