Background

NOIP 2013 Junior T2.

Problem Description

Given an arithmetic expression that contains only addition and multiplication, compute the value of the expression.

Input Format

One line: the expression to evaluate. The expression contains only digits, the addition operator +, and the multiplication operator *, with no parentheses. Every number that appears is an integer from $0$ to $2^{31}-1$.

The input guarantees that this line contains only these $12$ characters: 0123456789+*.

Output Format

Output a single integer: the value of the expression.

Note: If the answer has more than $4$ digits, output only the last $4$ digits, and do not output leading $0$s.

1+1*3+4

8

1+1234567890*1

7891

1+1000000003*1

4

Hint

For $30\%$ of the testdata, the total number of addition and multiplication operators in the expression is between $0$ and $100$ inclusive.

For $80\%$ of the testdata, the total number of addition and multiplication operators in the expression is between $0$ and $1000$ inclusive.

For $100\%$ of the testdata, the total number of addition and multiplication operators in the expression is between $0$ and $100000$ inclusive.

Translated by ChatGPT 5