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: 1678 - 831 + 1988 - 3248 - 7672 + 8515 + 5236 - 2764 - 6078

Output: 6532


Input: Consider Input: 5709 + 8211 + 3945 + 1143 - 7258

Output: -332


Input: Consider Input: 7742 - 6347 + 6955 + 8126 - 964 + 4393


Output: -4421