Expression#831
Given integers x_1, x_2, ..., x_n. Arrange between them the signs "+" and "-" so that the value of the resulting expression is equal to .
The first line contains two values n~(2 \le n \le 24) and s~(-10^9 \le s \le 10^9). The next line contains integers x_1, x_2, ..., x_n~(0 \le x_i \le 5 \cdot 10^7).
If it is impossible to get the result, print "No solution". Otherwise print the equality. If the solution is not unique, print any.
Example 1