100%AC

#include<cstdio>
int main(){
    int n;
    scanf("%d",&n);
    printf(n/100==n%10?"yes":"no");
}

#include<cstdio>
int main(){
    int n,n_pal=0;
    scanf("%d",&n);
    while(n>0){
        n_pal=n_pal*10+n%10;
        n/=10;
    }
    printf(n_pal==n?"yes":"no");
}

#include<iostream>
using namespace std;
int main(){
    string s,s_pal="";
    cin>>s;
    for(int i=s.length()/*s.size()*/-1;i>=0;i--){
        s_pal+=s[i];
    }
    cout<<(s_pal==s?"yes":"no");
}