Juni_Dev_log

▶ Collatz Conjecture (Problem) Introduction The Collatz Conjecture or 3x+1 problem can be summarized as follows: Take any positive integer n. If n is even, divide n by 2 to get n / 2. If n is odd, multiply n by 3 and add 1 to get 3n + 1. Repeat the process indefinitely. The conjecture states that no matter which number you start with, you will always reach 1 eventually. Given a number n, return ..

▶Reverse String (Problem) Introduction Reverse a string For example: input: "cool" output: "looc" - 주어진 문자열을 거꾸로 출력하도록 해보자. (Tip) - split() 으로 주어진 문자열을 쪼개서 배열로 만든다. - 배열에서 요소들을 거꾸로 만들 수 있는 reverse()를 이용한다. - 거꾸로 만든 배열을 다시 붙인다. join() 을 이용한다. (Solution) 1 2 3 4 5 export const reverseString = (string) => { var reverse_string = string.split('').reverse().join(''); return reverse_string; }; Colored ..

▶ Leap (Problem) Introduction Given a year, report if it is a leap year. The tricky thing here is that a leap year in the Gregorian calendar occurs: on every year that is evenly divisible by 4 except every year that is evenly divisible by 100 unless the year is also evenly divisible by 400 For example, 1997 is not a leap year, but 1996 is. 1900 is not a leap year, but 2000 is. 윤년을 계산해보는 코드를 작성해보..

▶ Matrix (Problem) Introduction Given a string representing a matrix of numbers, return the rows and columns of that matrix. So given a string with embedded newlines like: 9 8 7 5 3 2 6 6 7 representing this matrix: 1 2 3 |--------- 1 | 9 8 7 2 | 5 3 2 3 | 6 6 7 your code should be able to spit out: A list of the rows, reading each row left-to-right while moving top-to-bottom across the rows, A ..