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: 7533 + 2213 - 7566 + 455 - 6321 - 2480 + 1023 + 2407

Output: 17802


Input: Consider Input: 2653 + 9718 - 3237 + 2973 - 6895 - 18

Output: 112


Input: Consider Input: 63 - 1002 + 463 - 2198 + 9999 - 7044


Output: -155