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:
1123 - 8657 + 3476 - 5278 + 717 - 1557 + 6614 + 1549

Ex Output:
4259


Ex Input:
6820 - 387 + 8290 - 9203 - 9292 + 9249 - 3079

Ex Output:
11242


Ex Input:
5986 + 9293 + 3288 - 1791 + 6613 + 8185 - 7053

Ex Output:

-12549