Done is better than perfect

Question Given a non-negative integer x, compute and return the square root of x. Since the return type is an integer, the decimal digits are truncated, and only the integer part of the result is returned. Note: You are not allowed to use any built-in exponent function or operator, such as pow(x, 0.5) or x ** 0.5. 음이 아닌 정수 x가 주어졌을 때, 제곱근 x를 구하여라. 다만 제곱근 x를 구할 때 소수점 아래수는 버린다. Note: 내장 함수를 사용하면 안 ..

Question Implement pow(x, n), which calculates x raised to the power n (i.e., xn). x의 n승을 리턴하는 pow 함수를 구현하라. 제약사항 -100.0 < x < 100.0 -2^31 = 1; } } if (n < 0) { ans = (double)(1.0) / (double)(ans); } return ans; } }; // 해당 문제의 Discuss 참고 출처 : https://leetcode.com/explore/interview/card/top-interview-questions-medium/113/math/818/ Explore - LeetCode LeetCode Explore is the best place for everyone..

Question Write an algorithm to determine if a number n is happy. A happy number is a number defined by the following process: Starting with any positive integer, replace the number by the sum of the squares of its digits. Repeat the process until the number equals 1 (where it will stay), or it loops endlessly in a cycle which does not include 1. Those numbers for which this process ends in 1 are..

Question Given an array of intervals where intervals[i] = [starti, endi], merge all overlapping intervals, and return an array of the non-overlapping intervals that cover all the intervals in the input. 구간의 시작점과 끝점 정보가 담긴 배열들을 담고있는 배열이 주어졌을 때, 겹치는 구간을 모두 합쳐, 겹치는 구간이 없게 반환하라. 제약사항 1

Question Given a string s, return the longest palindromic substring in s. 문자열 s가 주어졌을 때, 가장 긴 palindromic 부분 문자열을 출력하라 제약사항 1 = 0; i--) { for (int j = i; j longest_length) { longest_length = j - i + 1; longest_substring = s.substr(i..

Question Given an m x n grid of characters board and a string word, return true if word exists in the grid. The word can be constructed from letters of sequentially adjacent cells, where adjacent cells are horizontally or vertically neighboring. The same letter cell may not be used more than once. Follow up: Could you use search pruning to make your solution faster with a larger board? 문자판의 m x ..

Question Given an integer array nums of unique elements, return all possible subsets (the power set). The solution set must not contain duplicate subsets. Return the solution in any order. 중복이 없는 정수 배열이 주어지면 가능한 모든 subsets(the power set)을 반환하여라. 중복된 subset이 포함되어서는 안 된다. 어떤 순서로 subset을 반환하건 상관이 없다. 제약사항 1

Question There is an integer array nums sorted in ascending order (with distinct values). Prior to being passed to your function, nums is possibly rotated at an unknown pivot index k (1