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Competitions

# Week 6: December 14 - 20. Char arrays 1

Let x is a variable initially equals to 0. Simulate the next operations with this variable:

• subtract a: subtract value a from x;
• multiply a: multiply x by a;

#### Input

Each line contains operation and value. Process all given operations. The value of the variable x after each operation doen not exceed 109 by absolute value.

#### Output

Print the resulting value of x.

Time limit 1 second
Memory limit 128 MiB
Input example #1
add 2
subtract 5
subtract 1
multiply -3

Output example #1
12

Input example #2
subtract 5
multiply -5

30