given a set of $$$n \le 10^5$$$ range $$$[x_i, 2 \times x_i]$$$ and $$$\sum x_i \le 10^5$$$ determine the number of arrays $$$a$$$ such that $$$x_i \le a_i \le 2 \times x_i$$$ and all the elements in $$$a$$$ are pairwise distinct
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is this not just very simple combinatorics or am i tripping
twin the general problem is lowkey unsolvable so you gotta consider the $$$[n, 2n]$$$ non-challant part twin
ohh i didnt see that each element in i is bounded by the corresponding x. nvm, i suck at reading and combinatorics