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: 2036 + 7313 - 8908 - 1870 - 5159 + 5945 + 5006 + 635 + 5551

Output: -6477


Input: Consider Input: 826 - 6501 - 223 + 9761 - 8863

Output: 6652


Input: Consider Input: 955 + 6975 - 1740 + 4859 - 4608 - 6700


Output: 2169