I'll play a trick on you

I'll play a trick on you

时间限制：3000 ms  |  内存限制：65535 KB
难度：1

描述Please look the picture carefully. Then I'll give you two integers and your task is output the third one.

Please never doubt the picture.



输入The first line is a number T(1<=T<=30), represents the number of case. The next T blocks follow each indicates a case.

Each case contains two integers A,B (1<=B<=A<=10^100)
输出For each case, output the number of case and the third integer.
样例输入

3
99 72
45 27
39 18

样例输出

27
18
21

来源2011 Alibaba Programming Contest
上传者
李文鑫

#include<stdio.h>

#include<string.h>

int main()

{
int t,i,j,sum1,sum2,sum,len1,len2;
scanf("%d",&t);
while(t--)
{
char a[101]={'\0'},b[101]={'\0'};
sum=0;
sum1=0;
sum2=0;
scanf("%s%s",a,b);
len1=strlen(a);
len2=strlen(b);
for(i=0;i<len1;++i)
sum1=sum1+(a[i]-'0');

for(j=0;j<len2;j++)
sum2=sum2+(b[j]-'0');

sum=sum1+sum2;
printf("%d\n",sum);
}
return 0;

}