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.

Ex Input:
6245 + 6705 - 5181 + 7350 - 5051 - 8984 - 476 + 3773

Ex Output:
8109


Ex Input:
6042 + 4328 - 5171 + 23 + 4485 + 8072 + 4298

Ex Output:
-9993


Ex Input:
8968 - 1212 + 2557

Ex Output:

7623