Arithmetic Expression Evaluation

Given a string representing a valid arithmetic expression that may include non-negative integers and the operators +, -, *, and /, evaluate the expression and print its result. The operator precedence follows the rules: multiplication and division are evaluated before addition and subtraction, and all operators are left-associative. Note that division is performed as integer division (i.e., the result is truncated towards zero). It is guaranteed that the input expression is syntactically correct.

inputFormat

The input consists of a single line containing an arithmetic expression. The expression may include spaces.

outputFormat

Output a single integer — the result of evaluating the expression.

1+1

2