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: 1971 - 5591 + 4038 + 5571

Output: -2047


Input: Consider Input: 1420 - 1910 - 3500 + 9535 + 3807 - 5009 - 1271 - 3426

Output: 3194


Input: Consider Input: 7368 + 7697 + 5672 + 4948 + 482


Output: -11431