Description Submission After sorting the nums, we only need to make sure that the same value is not used in the same place and the […]
46. Permutations
Description Submission Another Submission The new hand is not necessary, using pop_back() method of vector.
37. Sudoku Solver
Description Submission References https://leetcode.com/problems/sudoku-solver/discuss/734304/Extremely-Simple-CPP-Solution-with-excessive-comments-and-Line-by-Line-explanation.