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

Ex Output:
8782


Ex Input:
8243 + 5509 - 2652 - 916 - 1636 + 9824

Ex Output:
-1886


Ex Input:
1174 + 8385 - 6814 - 6369 + 5890 - 2359 + 2193 - 5302 + 99

Ex Output:

5451