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This question reduce to House Robbery. Notice that if we can take value one x, then we earn all value x. i.e. when we take number x, we will earn x * freq points Because of that, we can first convert nums to frequency map using collections.Counter function for Counter function, if...
509. 斐波那契数 - 斐波那契数 (通常用 F(n) 表示)形成的序列称为 斐波那契数列 。该数列由 0 和 1 开始,后面的每一项数字都是前面两项数字的和。也就是: F(0) = 0,F(1) = 1 F(n) = F(n - 1) + F(n - 2),其中 n > 1 给定 n ,请计算 F(n) 。 示例 1: 输入
但是排列组合的特征更明显Leetcode 17 Letter Combinations of a Phone NumberLeetcode 39 Combination Sum...
But unfortunately, due to the data error, one of the numbers in the set got duplicated to another number in the set, which results in repetition of one number and loss of another number.Given an array nums representing the data status of this set after the error. Your task is to ...
Insert Interval Go Hard O(n) O(1) 75. Sort Colors Go Medium O(n) O(1) 147. Insertion Sort List Go Medium O(n) O(1) O(log 148. Sort List Go Medium O(n log n) n) O(log 164. Maximum Gap Go Hard O(n log n) n) O(log 179. Largest Number Go Medium O(n log n) n...
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Day 5: [](No question) Day 6:290. Word Pattern Day 6:242. Valid Anagram Day 7:49. Group Anagrams Day 7:1. Two Sum Day 7:202. Happy Number Day 8:219. Contains Duplicate 11 Day 9:128. Longest Consecutive Sequence After 15 days ...
【leetcode】Valid Number 最近使用开发的过程中出现了一个小问题,顺便记录一下原因和方法-- Question : Validate if a given string is numeric. Some examples: "0"=>true " 0.1 "=>true "abc"=>false "1 a"=>false "2e10"=>true Note:It is intended for the problem statement to be ambiguous....
Have you consider that the string might be empty? This is a good question to ask during an interview. For the purpose of this problem, we define empty string as valid palindrome. 【解答】注意大小写,注意数字和字母都要算有效字符。 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18...