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: 4224 - 9761 - 8262 + 6568 - 5026 + 916 - 5225 - 2454 - 1897

Output: 29365


Input: Consider Input: 7312 - 1598 - 5813 - 8994 + 9174 - 4767 + 4076

Output: 15234


Input: Consider Input: 2557 + 9718 + 1328 + 436 - 145


Output: -8780