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: 4286 + 2085 - 8347

Output: 10548


Input: Consider Input: 6245 + 6705 - 5181 + 7350 - 5051 - 8984 - 476 + 3773

Output: 8109


Input: Consider Input: 549 + 2405 - 8368 + 806 + 5639


Output: 67