Problem:
Score : 100 points

Problem Statement

You are given a three-digit positive integer N.

Determine whether N is a palindromic number.

Here, a palindromic number is an integer that reads the same backward as forward in decimal notation.

Constraints

100≤N≤999

N is an integer.

Input

Input is given from Standard Input in the following format:

N

Output

If N is a palindromic number, print Yes; otherwise, print No.

Sample Input 1

575

Sample Output 1

Yes

N=575 is also 575 when read backward, so it is a palindromic number. You should print Yes.

Sample Input 2

123

Sample Output 2

No

N=123 becomes 321 when read backward, so it is not a palindromic number. You should print No.

Sample Input 3

812

Sample Output 3

No

Solution in C (GCC 5.4.1) (judge verdict: Wrong Answer)

#include<stdio.h>
#include<string.h>
int main()
{
    char a[4],b[4];
    int i,j,t=0;
    void judge(char[]);
    while(gets(a))
    {
        judge(a);
    }
    return 0;
}
void judge(char a[])
{
    int i,j,t=0;
    char b[4];
    j=strlen(a);
    strcpy(b,a);
    for(i=j-1;i>=0;i--)
    {
        if(a[i]>='0'&&a[i]<='9')
            a[t++]=a[i];
    }
    if(strcmp(a,b)==0)
        printf("YES\n");
    else
        printf("NO\n");
}