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: 3709 + 206 - 4363 + 3129 + 2506

Output: 2231


Input: Consider Input: 2653 + 9718 - 3237 + 2973 - 6895 - 18

Output: 112


Input: Consider Input: 1482 - 3555 + 8947 - 4201 + 6358 - 2249 + 1805 - 5870 + 4106


Output: -3859