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: 2673 - 123 - 5121 + 7601 + 976 + 4369 - 4232

Output: -797


Input: Consider Input: 4101 + 2536 - 502

Output: 2067


Input: Consider Input: 6226 - 9896 - 9119 + 3357 - 3401 + 4036


Output: 21249