HDOJ1229 ( 还是A+B ) 【研究生复试】

 

Problem : 1229 ( 还是A+B )     Judge Status : Accepted
RunId : 5937488    Language : C    Author : qq1203456195
Code Render Status : Rendered By HDOJ C Code Render Version 0.01 Beta

 

#include <stdio.h>
int f[9]={0,10,100,1000,10000,100000,1000000,10000000,100000000};
int main()
{
	int a,b,n;
	while (scanf("%d%d%d",&a,&b,&n),a||b)
	{
		if(a%f[n]==b%f[n])
			printf("-1\n");
		else
			printf("%d\n",a+b);
	}
}