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: 4700 + 6640 + 3352 - 3114 - 7674 - 8204 + 8654 + 8091 - 2969

Output: -76


Input: Consider Input: 7344 + 9206 + 3989 + 5648 - 7620

Output: -3879


Input: Consider Input: 533 + 2145 + 802 + 3091 + 1441 - 8325


Output: 1379