Score : 100 points
Joisino wants to evaluate the formula "A op B".
Here, A and B are integers, and the binary operator op is either +
or -
.
Your task is to evaluate the formula instead of her.
+
or -
.The input is given from Standard Input in the following format:
A op B
Evaluate the formula and print the result.
1 + 2
3
Since 1 + 2 = 3, the output should be 3.
5 - 7
-2