a022: 迴文 FYI: https://yunlinsong.blogspot.com/2016/02/blog-post_7.html

a022.cpp

#include <iostream>

using namespace std;

void msg(bool b);
bool isPalindrome( const string &s );

int main()
{
    string str;
    while(cin >> str)
    {
        msg(isPalindrome(str));
    }
    return 0;
}

void msg(bool b)
{
    cout << (b?"yes":"no") << endl;
}

bool isPalindrome( const string &s )
{
    short len = s.length();
    for(short i = 0; i < len / 2; i++)
    {
        if( s[i] != s[len - 1 - i] )
            return false;
    }

    return true;
}