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: 3186 + 271 - 7916

Output: 10831


Input: Consider Input: 6120 - 9271 - 7167 + 6916 - 2510 + 7854 - 7909 - 1960 - 3775

Output: 23942


Input: Consider Input: 4100 + 1887 - 4314


Output: 6527