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: 242 - 3824 + 6718 - 4276 + 8975

Output: -7351


Input: Consider Input: 1649 + 4642 + 613 - 7051 - 8575

Output: 12020


Input: Consider Input: 870 - 5691 - 4969 - 9129 - 2201 + 6807


Output: 16053