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| //
// main.cpp
// largeNumberSort
//
// Created by Richard on 9/9/15.
// Copyright (c) 2015 luxin. All rights reserved.
//
#include <string>
#include <iostream>
#define MAX_NUM 2000
using namespace std;
int add1[MAX_NUM],add2[MAX_NUM],res[MAX_NUM],tmp;
char tmp1[MAX_NUM],tmp2[MAX_NUM];
int N;
int main() {
cin>>N;
int count = 0;
tmp = 0;
while (count < N) {
memset(add1,0,sizeof(add1));
memset(add2,0,sizeof(add2));
memset(res,0,sizeof(res));
memset(tmp1,0,sizeof(tmp1));
memset(tmp2,0,sizeof(tmp2));
cin>>tmp1>>tmp2;
int len1 = static_cast<int>(strlen(tmp1));
int len2 = static_cast<int>(strlen(tmp2));
for (int i = len1-1,k = 0; i >= 0; --i,++k) {
add1[k] = tmp1[i] - '0';
}
for (int i = len2-1,k = 0; i >= 0; --i,++k) {
add2[k] = tmp2[i] - '0';
}
if (len1 >= len2) {
for (int i = 0; i <= len1; ++i) {
res[i] = (add1[i] + add2[i] + tmp) % 10;
tmp = (add1[i] + add2[i] + tmp) / 10;
}
}else if (len1 < len2) {
for (int i = 0; i <= len2; ++i) {
res[i] = (add1[i] + add2[i] + tmp) % 10;
tmp = (add1[i] + add2[i] + tmp) / 10;
}
}
int len = 0;
if (len1 >= len2) len = len1;
else len = len2;
//TODO: priint it
cout<<"Case "<<(count+1)<<":\n"<<tmp1<<" + "<<tmp2<<" = ";
if (res[len] != 0) cout<<res[len];
for (int i = len-1; i >= 0; --i) {
cout<<res[i];
}
cout<<"\n";
if (count != N-1) {
cout<<"\n";
}
count++;
}
}
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