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  1. # include <bits/stdc++.h>
  2. using namespace std;
  3. int main(void)
  4. {
  5.     string s;
  6.     cin>>s;
  7.     s = '#' + s;
  8.     int n = s.length() - 1;
  9.     int cnt = 0;
  10.     for (int i = 1;i + i <= n;++i)
  11.         if (s[i] != s[n - i + 1])
  12.             ++cnt;
  13.     if ((cnt <= 1 && (n&1)) || cnt == 1) puts("YES");
  14.     else puts("NO");
  15.     return 0;
  16. }
  17.  
Success #stdin #stdout 0s 16064KB
comments (?)
stdin 
Standard input is empty
stdout 
NO
https://ideone.com/RHLhXu
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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