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: 1815 - 3167 - 773

Output: 5755


Input: Consider Input: 9467 + 7102 - 1964

Output: 4329


Input: Consider Input: 7803 - 4853 + 5338 - 1253 + 3586 - 4878 + 6843


Output: 3020