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CF1807A.Plus or Minus

普及/提高-

通过率：0%

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题目描述

You are given three integers aa , bb , and cc such that exactly one of these two equations is true:

  • a+b=ca+b=c
  • a−b=ca-b=c

Output + if the first equation is true, and - otherwise.

输入格式

The first line contains a single integer tt ( 1≤t≤1621 \leq t \leq 162 ) — the number of test cases.

The description of each test case consists of three integers aa , bb , cc ( 1≤a,b≤91 \leq a, b \leq 9 , −8≤c≤18-8 \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.

输出格式

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

输入输出样例

  • 输入#1

    11
1 2 3
3 2 1
2 9 -7
3 4 7
1 1 2
1 1 0
3 3 6
9 9 18
9 9 0
1 9 -8
1 9 10

    输出#1

    +
-
-
+
+
-
+
+
-
-
+

说明/提示

In the first test case, 1+2=31+2=3 .

In the second test case, 3−2=13-2=1 .

In the third test case, 2−9=−72-9=-7 . Note that cc can be negative.

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