#include<bits/stdc++.h>
using namespace std;
int main()
{
int n,num,rev=0,digit,i;
//cin>>num;
for(n=1;n<100;n++)
{
num=n;
while(num>0)
{
digit=num%10;
rev=(rev*10)+digit;
num=num/10;
}
if(n==rev)
cout<<n<<endl;
}
return 0;
}
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