2057--A+B

Problem Description

There must be many A + B problems in our HDOJ , now a new one is coming.
Give you two hexadecimal integers , your task is to calculate the sum of them,and print it in hexadecimal too.
Easy ? AC it !

Input

The input contains several test cases, please process to the end of the file.
Each case consists of two hexadecimal integers A and B in a line seperated by a blank.
The length of A and B is less than 15.

Output

For each test case,print the sum of A and B in hexadecimal in one line.

Sample Input

+A -A
+1A 12
1A -9
-1A -12
1A -AA

Sample Output

0
2C
11
-2C
-90

---

十六進制，大寫字母表示
要分a+b的正負情況，分別輸出

---

#include<stdio.h>

int main()
{
    long long int a,b;

    while (~scanf ("%llX%llX",&a,&b))
    {
        if (a+b >= 0)
            printf ("%llX\n",a+b);
        else
            printf ("-%llX\n",-(a+b));
    }
    return 0;
}