#include<stdio.h>
int main()
{
  int x;
  printf("请输出一个数");
  scanf("%d",&x);
  int dight;
  int ret = 0;
  while(x>o)
  {
dight = x%10;
    ret = ret*10+dight;
    x/=10;
  }
  printf("%d",ret);
  return 0;
}