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: 2909 + 1799 - 984 + 4910 + 3253 - 6846 - 8324 - 9048

Output: 18149


Input: Consider Input: 7163 + 3916 + 4926 + 2532 - 2743 - 5389 + 7290


Output: -3369