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:
9990 - 8613 - 152 + 4529

Ex Output:
14226


Ex Input:
2909 + 1799 - 984 + 4910 + 3253 - 6846 - 8324 - 9048

Ex Output:
18149


Ex Input:
6743 - 5149 + 1860 + 5594 + 8875 + 7675

Ex Output:

-12112