题目的链接
http://noi.openjudge.cn/ch0105/29/
#include <iostream>
using namespace std;
int main()
{
int x,a,b,c;
int ans=0;
cin>>x;
if( x<0)
{
cout<<"-";
x=-x;
}
while( x )
{
ans=ans*10+x%10;
x=x/10;
}
cout<<ans<<endl;
return 0;
}