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:
4117 - 7011 - 9534 - 3901 - 9537 + 6979

Ex Output:
27121


Ex Input:
5945 + 1046 + 9187 + 929

Ex Output:
-5217


Ex Input:
2303 + 151 - 7031 + 7349 - 8676 + 9084 + 9773

Ex Output:

-8347