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: 86 - 2166 - 8519 - 7184 - 362 - 2203 + 1579 - 1133 + 3978

Output: 16096


Input: Consider Input: 9467 + 7102 - 1964

Output: 4329


Input: Consider Input: 1852 + 1870 - 6341 - 6836 - 1537


Output: 14696