P401361 - GYM100418 A A+-B - SSOJ - 省实信息奥赛评测系统

Memory Limit：64 MB Time Limit：1 S

Judge Style：Text Compare Creator：

Submit：0 Solved：0

A. A+-Btime limit per test1 secondmemory limit per test64 megabytesinputstandard inputoutputstandard output

You are given the integer numbers A and B. Output A + B or A - B.

Input

The first line contains two numbers A, B separeted by a single space ( - 2⁶³ ≤ A, B < 2⁶³).

Output

Output one integer number: A + B or A - B.

ExamplesInput

15 27

Output

Input

100 58

Output

401361: GYM100418 A A+-B