1659 Maximize Grid Happiness C++ Python O(C(m * n, i) * C(m * n - i, e)) O(min(m * n, i + e)) Hard Pruning 1718 Construct the Lexicographically Largest Valid Sequence C++ Python O(n!) O(b) Medium Backtracking 1723 Find Minimum Time to Finish All Jobs C++ Python O(k^n ...