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: 42 + 6517 - 146 + 304 - 4759 + 148 - 3822

Output: 1800


Input: Consider Input: 6142 + 418 - 7535 - 7185 - 5518 + 7544 - 1019 - 938 - 9490

Output: 29865


Input: Consider Input: 9123 + 9380 - 549 - 1087 - 7865 + 1668


Output: 7576