[JAVA] 알고리즘 문제풀이 입문 1.11번

강의: https://inf.run/w779

자바(Java) 알고리즘 문제풀이 입문: 코딩테스트 대비 - 인프런 | 강의

 

 

1.11번

import java.util.Scanner;

 

public class Main {

  public String solution(String str){

    str = str+" ";

    String answer = "";

    int count = 1;

   

    for(int i = 0; i < str.length()-1; i++){

      if(str.charAt(i) == str.charAt(i+1)){

        count++;

      }else{

        answer += str.charAt(i);

        if(count > 1){

          answer += String.valueOf(count);

          count = 1;

        }

      }

    }

    return answer.toString();

  }

  public static void main(String[] args){

    Main m = new Main();

    Scanner in = new Scanner(System.in);

    String input = in.next();

    in.close();

    System.out.println(m.solution(input));

    return ;

  }

}

 

 

1.12

import java.util.Scanner;

 

public class Main {

  public String solution(String str,int n){

    String answer = "";

    for(int i = 0; i < n; i++){

      String s = str.substring(0,7).replace('#', '1').replace('*', '0');

      int num = Integer.parseInt(s, 2);

      answer += (char)num;

      str = str.substring(7);

    }

    return answer;

  }

  public static void main(String[] args){

    Main m = new Main();

    Scanner in = new Scanner(System.in);

    int num = in.nextInt();

    String input = in.next();

    in.close();

    System.out.println(m.solution(input, num));

    return ;

  }

}