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: 2432 + 588 - 6240 + 8670

Output: -586


Input: Consider Input: 4195 + 6940 - 1053 - 4433 + 1540

Output: 1201


Input: Consider Input: 3047 - 8370 + 4766


Output: 6651