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.

Input: Consider Input: 8354 + 2602 + 1315

Output: 4437


Input: Consider Input: 3428 - 8444 - 2270 - 3241 - 1368 - 8884 - 6840 - 5265

Output: 39740


Input: Consider Input: 1938 + 4697 + 258 + 8394


Output: -11411