Competitions

# Programming Principles 1. Week 6. October 7 - 13. PART 2

# Arithmetic

Specifies the expression that contains only numbers and operations **+** and *****. Calculate the value of the expression, assuming that the operations ***** and **+** have the same priority. In this case **2** + **2** * **2** equals **8**.

#### Input

Given non-empty string **S** with no more than **9** characters. **S** line contains only numbers, and operators **+** and *****. **S** always starts with a number and sets the correct recording of an arithmetic expression. Left and right of each operation is a figure to the left and to the right of each digit is placed or the beginning \ end of line, or a mathematical operation.

#### Output

Print the result of expression.

Input example #1

1+1*2

Output example #1

4

Input example #2

2*9*4

Output example #2

72

Input example #3

5

Output example #3

5