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: 8513 - 7119 - 47

Output: 15679


Input: Consider Input: 3881 + 3747 + 6493 - 7538

Output: 1179


Input: Consider Input: 3080 + 8905 - 629 + 7162 - 9210


Output: -3148