#include <bits/stdc++.h>
using namespace std;
string f(string s,int cnt, int i, int j, int n){
if(i>=j){
if(cnt==n/2)
return "true";
else
return "false";
}
if(s[i]==s[j]){
cnt++;
return f(s,cnt, i+1,j-1,n);
}
else
return "false";
}
int main() {
string s="abccba";int cnt=0;
int i=0; int j=5; int n=6;
cout<<f(s,cnt,i,j,n);
return 0;
}
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