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

Ex Output:
-9993


Ex Input:
7733 - 8455 - 6291 - 3837 - 994

Ex Output:
27310


Ex Input:
5243 + 7494 + 6229 + 3895 - 9298 - 7396 - 8275

Ex Output:

12594