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:
9050 + 7188 + 3589 + 8762 + 268 + 1995 + 6080 - 4900

Ex Output:
-13932


Ex Input:
8849 + 869 + 880 + 8843 + 8122

Ex Output:
-9865


Ex Input:
8949 - 2970 - 3172 + 6889 - 8334 - 9391 - 6287 - 337 + 5135

Ex Output:

27416