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: 1229 - 4354 + 912 - 1766

Output: 6437


Input: Consider Input: 3680 + 8725 - 9052 - 1948 - 3094 - 744 - 7412


Output: 17205