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:
1259 - 2367 + 9919 + 7196 + 4121

Ex Output:
-17610


Ex Input:
7099 + 7754 - 6005 + 852 - 2187 + 4606 - 6703

Ex Output:
8782


Ex Input:
2620 - 8542 - 5080 + 9012 - 1148 - 390 + 914

Ex Output:

7854