CF1807A Plus or Minus

You are given three integers $ a $ , $ b $ , and $ c $ such that exactly one of these two equations is true: - $ a+b=c $ - $ a-b=c $ Output + if the first equation is true, and - otherwise.

The first line contains a single integer $ t $ ( $ 1 \leq t \leq 162 $ ) — the number of test cases. The description of each test case consists of three integers $ a $ , $ b $ , $ c $ ( $ 1 \leq a, b \leq 9 $ , $ -8 \leq c \leq 18 $ ). The additional constraint on the input: it will be generated so that exactly one of the two equations will be true.

For each test case, output either + or - on a new line, representing the correct equation.

In the first test case, $ 1+2=3 $ . In the second test case, $ 3-2=1 $ . In the third test case, $ 2-9=-7 $ . Note that $ c $ can be negative.