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: 1320 + 3923 - 1080 - 3521 - 8998 + 4479 - 2559 - 7680

Output: 16756


Input: Consider Input: 2078 + 3891 + 2060

Output: -3873


Input: Consider Input: 4299 + 8856 - 8740 - 5677 + 9658


Output: 202


