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:
7591 + 2427 + 6553 + 4047 - 9300 + 2235 + 7278

Ex Output:
-5649


Ex Input:
8157 - 2717 - 1214 + 8558 + 7391 - 7163 + 6203 - 6912

Ex Output:
4011


Ex Input:
9984 - 1586 - 8751 + 642 - 6382 + 7141 - 9742 + 2864

Ex Output:

25798