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LeetCode-746-Min Cost Climbing Stairs

LeetCode-746-Min Cost Climbing Stairs

1、题目 On a staircase, the i-th step has some non-negative cost cost[i] assigned (0 indexed). Once you pay the cost, you can either climb one or two steps. You need to find minimum cost to reach th...

Posted by Jae on June 23, 2019

LeetCode-Alg-1005-Maximize Sum Of Array After K Negations

LeetCode-Alg-1005-Maximize Sum Of Array After K Negations

1、题目 Given an array A of integers, we must modify the array in the following way: we choose an i and replace A[i] with -A[i], and we repeat this process K times in total. (We may choose the same ...

Posted by Jae on June 20, 2019

LeetCode-Alg-970-Powerful-Integers

LeetCode-Alg-970-Powerful-Integers

1、题目 Given two positive integers x and y, an integer is powerful if it is equal to x^i + y^j for some integers i >= 0 and j >= 0. Return a list of all powerful integers that have value less...

Posted by Jae on June 19, 2019

LeetCode-Alg-860-Lemonade-Change

LeetCode-Alg-860-Lemonade-Change

1、题目 At a lemonade stand, each lemonade costs $5. Customers are standing in a queue to buy from you, and order one at a time (in the order specified by bills). Each customer will only buy one le...

Posted by Jae on June 19, 2019

LeetCode-Alg-400-Nth-Digit

LeetCode-Alg-400-Nth-Digit

1、题目 Find the nth digit of the infinite integer sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, … Note: n is positive and will fit within the range of a 32-bit signed integer (n < 231). Example 1...

Posted by Jae on June 18, 2019

LeetCode-Alg-1025-Divisor Game

LeetCode-Alg-1025-Divisor Game

1、题目 Alice and Bob take turns playing a game, with Alice starting first. Initially, there is a number N on the chalkboard. On each player’s turn, that player makes a move consisting of: Choosin...

Posted by Jae on June 16, 2019

LeetCode-Alg-285-Add Digits

LeetCode-Alg-285-Add Digits

1、题目 Given a non-negative integer num, repeatedly add all its digits until the result has only one digit. Example: Input: 38 Output: 2 Explanation: The process is like: 3 + 8 = 11, 1 + 1 = 2. ...

Posted by Jae on June 3, 2019

LeetCode-Alg-171-Excel Sheet Column Number

LeetCode-Alg-171-Excel Sheet Column Number

1、题目 Given a column title as appear in an Excel sheet, return its corresponding column number. For example: A -> 1 B -> 2 C -> 3 ... Z -> 26 AA -> 27 AB -> 28 ... Example 1: I...

Posted by Jae on June 1, 2019

LeetCode-Alg-168-Excel Sheet Column Title

LeetCode-Alg-168-Excel Sheet Column Title

1、题目 Given a positive integer, return its corresponding column title as appear in an Excel sheet. For example: 1 -> A 2 -> B 3 -> C ... 26 -> Z 27 -> AA ...

Posted by Jae on May 31, 2019

LeetCode-Alg-784-Letter Case Permutation

LeetCode-Alg-784-Letter Case Permutation

1、题目 Given a string S, we can transform every letter individually to be lowercase or uppercase to create another string. Return a list of all possible strings we could create. Examples: Input: S...

Posted by Jae on May 29, 2019

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