Tag: Hash Table

  1. Leetcode 36 Valid Sudoku

    Leetcode 36 Valid Sudoku etermine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules. The Sudoku board could be partially filled, where empty cells are filled with the character '.'. A partially filled sudoku which is valid. Note: A valid Sudoku board (partially filled) is not…

    on Hash Table

  2. Leetcode 136 Single Number

    Problem 136 Single Number Given an array of integers, every element appears twice except for one. Find that single one. Note: Your algorithm should have a linear runtime complexity. Could you implement it without using extra memory? First time when I saw this problem, I felt confusing, and the first…

    on Hash Table Bit Manipulation