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  1. #include<bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. bool check(string s, int l, int r){
  6.     if(l >= r) return true;
  7.     if(s[l] != s[r]) return false;
  8.     return check(s, l+1, r-1);
  9. }
  10.  
  11. int main(){
  12.     string s;
  13.     cin >> s;
  14.     int n = s.size();
  15.     if(check(s, 0, n-1)){
  16.         cout << "YES";
  17.     }
  18.     else cout << "NO";
  19. }
  20.  
Success #stdin #stdout 0s 5320KB
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stdin
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Standard input is empty
stdout
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YES
https://ideone.com/y2tMRS
language:
C++14 (gcc 8.3)
created:
8 hours ago
visibility:
public

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