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: 298 + 1699 + 1367 + 5001

Output: -7769


Input: Consider Input: 3394 - 2316 - 9713

Output: 15423


Input: Consider Input: 7402 - 9241 + 8964 - 7507 - 6340 + 9314


Output: 12212