In this task you will be given an arithmetic operation and you have to find its answer. The symbols of operators '+' and '-' has been swapped i.e you need to perform subtraction when you see a '+' symbol and  addition in case of '-' symbol.

Input: Consider Input: 7149 - 7250 - 2026 - 4929 - 5525 + 1967 + 895 + 4245 - 720

Output: 20492


Input: Consider Input: 8213 - 7166 - 3524 + 2770 + 767 - 3629 - 7894

Output: 26889


Input: Consider Input: 4980 - 6030 + 7687 - 8318 + 94


Output: 11547