三位数反转-题解(C++代码)

为什么系统显示答案错误50%呢，编译结果和示例上一样啊，望指教
#include<stdio.h>
int main()
{
int n, m, a, b, c;
scanf("%d", &n);
a = n / 100;
b = n / 10 % 10 *10;
c = n % 10 *100;
m = c + b + a;
printf("%d", m);
return 0;
}
#include<stdio.h>
int main()
{
    int i,a,b,c;
    scanf("%d",&i);
    a=i/100;
    b=i/10%10;
    c=i-100*a-10*b;
    printf("%d%d%d",c,b,a);
	return 0;
}