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: 1510 + 8779 + 5742 - 9951 - 2155

Output: -905


Input: Consider Input: 9403 + 6381 - 6599 - 2097 - 3046

Output: 14764


Input: Consider Input: 400 + 5428 - 8044 + 5917 - 8343 - 636


Output: 6078