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: 556 + 5223 - 5888 + 4866

Output: -3645


Input: Consider Input: 496 + 5072 + 6259 + 1493 + 4824 + 2052 + 4751 - 8038

Output: -15917


Input: Consider Input: 2176 + 9979 + 1539 + 882 + 1329 + 1706 - 7312 - 7839


Output: 1892