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:
2367 + 2751 + 138 + 6347 + 5297

Ex Output:
-12166


Ex Input:
8838 + 1241 - 4918 - 8353 - 4691 - 5880

Ex Output:
31439


Ex Input:
9012 - 7958 - 951 - 3753 + 5601 + 8942 + 2251 + 4526

Ex Output:

354