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: 7165 + 3630 + 9021 - 4140 + 319

Output: -1665


Input: Consider Input: 1678 - 831 + 1988 - 3248 - 7672 + 8515 + 5236 - 2764 - 6078

Output: 6532


Input: Consider Input: 640 + 7414 + 3173 - 5704 + 3257 + 3878 + 6272


Output: -17650