#include <stdio.h>
int reverse(int number);
int main()
{
int number;
scanf("%d",&number);
printf("%d",reverse(number));
}
int reverse(int number)
{
int symbol=1,s=0,a;
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if (number<0)
{
number=-number; //注意负数
symbol=-1;
}
do
{
a=number%10; //123%10=3// //a=12%10=2
s=s*10+a; //s=0+3// //s=3*10+2
number/=10; //number=12// //number=1
}
s=s*symbol
return s;
}