摘要：
LeetCode:36. Valid Sudoku，数独是否有效 : 题目: LeetCode: [36. Valid Sudoku ][1] 描述： Determine if a Sudoku is valid, according to: [Sudoku Puzzles][4] The Rule 阅读全文
摘要：
LeetCode:60. Permutation Sequence，n全排列的第k个子列 : 题目: LeetCode: [ 60. Permutation Sequence][1] 描述： The set [1,2,3,…,n] contains a total of n! unique perm 阅读全文