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: 3915 + 4904 + 4887 + 7162 - 3798 + 233 + 1101 - 7758 - 4627

Output: 1811


Input: Consider Input: 8576 - 8960 - 1317 + 5701 + 5413 - 1195 + 135

Output: 8799


Input: Consider Input: 507 + 3439 - 8086 - 5497 + 2145 + 2124 + 9603 + 2119 + 8351


Output: -13691