Evaluate Simple Expression

You are given a string representing a simple mathematical expression. The expression consists of non-negative integers and the + and - operators.

The expression should be evaluated from left to right without operator precedence. That is, given an expression of the form $$a_1 \; op_1 \; a_2 \; op_2 \; a_3 \; \dots,$$ the operations are performed in the order they appear.

For example, the expression "10+5-27+6" is evaluated as follows:

• 10 + 5 = 15
• 15 - 27 = -12
• -12 + 6 = -6

Your task is to compute and output the final result of the expression.

inputFormat

The input consists of a single line containing a string s, which is the arithmetic expression. The string includes digits (0-9) and the operators '+' and '-'. There are no spaces in the input.

outputFormat

Output a single integer which is the result of evaluating the expression from left to right.

5

5