1.import java.util.Scanner;
public class Main4 {
public static void main(String[] args) {
Scanner sca = new Scanner(System.in);
String str = sca.next();
int a = str.length();
int middle = a / 2;//直接去该数的中间位，不用考虑数的长度是奇数还是偶数
int i,j=0;
for (i = 0; i < middle && str.charAt(i) == str.charAt(a - 1 - i);i++)//下标从0开始要注意
j++;
if (j < middle)
System.out.println(str + "不是回文");
else
System.out.println(str + "是回文");
}
}
2.import java.util.*;
public class Main{
public static void main(String[] args){
int n;
Scanner sc=new Scanner(System.in);
n=sc.nextInt();
int s,a,b,c,d,e,sum;
for(s=10000;s<=99999;s++)
{
a=s%10;
b=s/10%10;
c=s/100%10;
d=s/1000%10;
e=s/10000;
sum=a+b+c+d+e;
if(sum==n&&a==e&&b==d)
{
System.out.println(s);
}
}
int f,g,h,i,j,k,l,num;
for(k=100000;k<=999999;k++)
{
f=k%10;
g=k/10%10;
h=k/100%10;
i=k/1000%10;
j=k/10000%10;
l=k/100000;
num=f+g+h+i+j+l;
if(num==n&&f==l&&g==j&&h==i)
{
System.out.println(k);
}
}
}
}
