1 #include<cstring>
 2 #include<cstdio>
 3 using namespace std;
 4 
 5 int main()
 6 {
 7     //freopen("in.txt","r",stdin);
 8     int count,temp;
 9     int a1[1010],a2[1010];
10     char s1[1010],s2[1010];
11     int t,i,j,len1,len2;
12     scanf("%d",&count);
13     t=1;
14     while(count--)
15     {
16         printf("Case %d:\n",t++);
17         memset(a1,0,sizeof(a1));
18         memset(a2,0,sizeof(a2));
19         scanf("%s%s",s1,s2);
20         printf("%s + %s = ",s1,s2);
21         int len1=strlen(s1);
22         int len2=strlen(s2);
23         for(i=len1-1,j=0;i>=0;i--)
24         a1[j++]=s1[i]-‘0‘;
25         for(i=len2-1,j=0;i>=0;i--)
26         a2[j++]=s2[i]-‘0‘;
27         int maxlen=len1>len2?len1:len2;
28         for(i=0;i<maxlen;i++)
29         {
30             a1[i]+=a2[i];
31             if(a1[i]>=10)
32             {
33                 a1[i+1]+=1;
34                 a1[i]-=10;
35             }
36         }
37         for(j=1009;j>=0;j--)
38         if(a1[j])break;
39         if(j==-1)
40         printf("0");
41         for(;j>=0;j--)
42         printf("%d",a1[j]);
43         printf("\n");
44         if(count!=0)
45         printf("\n");
46     }
47     return 0;
48 }