07 2015 档案
摘要：1. Class Variable/Static Variable: Class variable is also known as static variable with "static" keyword inside the class but outside the methods. The
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摘要：原题链接在这里：https://leetcode.com/problems/happy-number/ 题目： Write an algorithm to determine if a number is "happy". A happy number is a number defined by
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摘要：原题链接在此: https://leetcode.com/problems/isomorphic-strings/ 题目： Given two strings s and t, determine if they are isomorphic. Two strings are isomorphic
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摘要：原题链接在此：https://leetcode.com/problems/sudoku-solver/ 题目： Write a program to solve a Sudoku puzzle by filling the empty cells. A sudoku solution must sa
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摘要：原题链接在此：https://leetcode.com/problems/n-queens/ 题目： The n-queens puzzle is the problem of placing n queens on an n×n chessboard such that no two queens
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摘要：Final is a Keyword, final can be used in three different ways: final variable final method final class final variable 基本上就是 constant，一旦被赋值，就不能被变更；如果在c
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摘要：原题链接在这里：https://leetcode.com/problems/valid-sudoku/ 题目： Determine if a 9x9 Sudoku board is valid. Only the filled cells need to be validated according
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摘要：原题链接在这里：https://leetcode.com/problems/contains-duplicate-ii/ 题目： Given an array of integers and an integer k, find out whether there are two distinct
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