题解 | #数字颠倒#

import java.util.*;
public class Main{
public static void main(String[] args){
Scanner in = new Scanner(System.in);
String str = in.nextLine();
long num = Long.parseLong(str);
int[] nums = new int[str.length()];
for(int i=str.length()-1;i>=0;i--){
nums[i]=(int)num%10;
num/=10;

    }
    StringBuffer sb = new StringBuffer("");
   for(int e :nums ){
       sb.append(e);
   }
     System.out.println(sb.reverse());
}   

}