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: 8602 - 1293 - 8063 - 4529 + 453 - 6407

Output: 28441


Input: Consider Input: 7169 + 1918 - 7501 + 5160 + 9033 - 3341 + 4286

Output: -2386


Input: Consider Input: 2402 - 1499 + 9001 - 57 + 3092


Output: -8135