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: 2372 + 1272 - 6861 - 1715 - 7374 + 9798 - 7485

Output: 14737


Input: Consider Input: 1815 - 3167 - 773

Output: 5755


Input: Consider Input: 3618 - 7583 - 9020 - 8472 + 4627 - 5019


Output: 29085