백준 - 알고리즘 기초 1/2 ( 303 - 수학 ( 참고 ) )

백준 알고리즘 기초 강의에 명시된 문제를 풀이한 포스트입니다

1. 11005번 - 진법 변환 2

const readline = require("readline");
const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout,
});

const input = [];

rl.on("line", (line) => {
  input.push(line);

  rl.close();
}).on("close", () => {
  const [N, B] = input[0].split(" ").map((v) => +v);

  console.log(N.toString(B).toUpperCase());

  process.exit();
});

2. 2745번 - 진법 변환

const readline = require("readline");
const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout,
});

const input = [];

rl.on("line", (line) => {
  input.push(line);

  rl.close();
}).on("close", () => {
  const [N, B] = input[0].split(" ");

  console.log(parseInt(N, +B).toString(10));

  process.exit();
});

3. 11576번 - Base Conversion

문제 이해 못함

const readline = require("readline");
const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout,
});

const input = [];

rl.on("line", (line) => {
  input.push(line);

  if (+input[0] === input.length - 1) rl.close();
}).on("close", () => {
  /**
   * [입력]
   * A진법, B진법
   * M: 입력 숫자의 자리수의 개수
   * A진법 숫자 M개 ( 공백 구분 )
   *
   * [출력]
   * A진법 숫자들 ---> B진법 숫자들
   *
   * 결론: A진법 숫자들 --> 10진법 숫자들 --> B진법 숫자들
   */

  process.exit();
});

4. 11653번 - 소인수분해

const readline = require("readline");
const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout,
});

const input = [];

rl.on("line", (line) => {
  input.push(line);

  rl.close();
}).on("close", () => {
  let number = +input[0];
  let divideNumber = 2;
  const answer = [];

  while (number !== 1) {
    if (number % divideNumber === 0) {
      answer.push(divideNumber);
      number = number / divideNumber;
    } else {
      divideNumber++;
    }
  }

  console.log(answer.join("\n"));

  process.exit();
});