P5083 Function
Description
Xiaoben has a binary function $f(a,b)$.
If $a
Input Format
The input contains multiple test cases.
Each test case consists of one line with two positive integers $a,b$.
Output Format
For each test case, output one line containing the value of $f(a,b)$.
Explanation/Hint
For $40\%$ of the testdata, $a,b