300331: CF64B. Expression

Memory Limit:64 MB Time Limit:2 S
Judge Style:Text Compare Creator:
Submit:0 Solved:0

Description

B. Expressiontime limit per test2 secondsmemory limit per test64 megabytesinputstandard inputoutputstandard output

You are given a line «n#m», where «n» and «m» are digits, and «#» is a sign «+» or «-». Print the value of the given expression.

Input

The only given line has a string in form «n#m», where «n» and «m» are digits (from 0 to 9), and «#» is a sign «+» or «-».

Output

Print the value of the given expression.

ExamplesInput
1-5
Output
-4

Input

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