ep 02-3. 간단한 문제 풀이(1~5)

1번 문제

2557번: Hello World (acmicpc.net)

2557번: Hello World

정답

public class Main
{
	public static void main(String[] args) {
		System.out.println("Hello World!");
	}
}

 

 

 

 

2번 문제

10869번: 사칙연산 (acmicpc.net)

10869번: 사칙연산

정답

import java.util.Scanner;

public class Main
{
	public static void main(String[] args) {
	int x1;
	int x2;
	
	Scanner sc = new Scanner(System.in);
	x1 = sc.nextInt();
	x2 = sc.nextInt();
	
	System.out.println(x1 + x2);
	System.out.println(x1 - x2);
	System.out.println(x1 * x2);
	System.out.println(x1 / x2);
	System.out.println(x1 % x2);
	}
}

 

 

 

 

3번 문제

10926번: ??! (acmicpc.net)

10926번: ??!

정답

import java.util.Scanner;

public class Main
{
	public static void main(String[] args) {
	String x;
	
	Scanner sc = new Scanner(System.in);
	x = sc.nextLine();
	
	System.out.println(x + "??!");
	}
}

 

 

4번 문제

2588번: 곱셈 (acmicpc.net)

2588번: 곱셈

 

정답

import java.util.Scanner;
import java.util.ArrayList;
import java.util.Arrays;

public class Main
{
	public static void main(String[] args) {
	int n1;
	String n2;
	
	Scanner sc = new Scanner(System.in);
	n1 = sc.nextInt();
	n2 = sc.next();
	
    ArrayList<String> nlist =new ArrayList<>(Arrays.asList(n2.split("")));
	
	for(int i = nlist.size()-1; i >= 0; i--){
	    System.out.println(Integer.parseInt(nlist.get(i)) * n1);
	}
	System.out.println(Integer.parseInt(n2) * n1);
	}
}

 

 

 

5번 문제

18108번: 1998년생인 내가 태국에서는 2541년생?! (acmicpc.net)

18108번: 1998년생인 내가 태국에서는 2541년생?!

 

 

정답

import java.util.Scanner;

public class Main
{
	public static void main(String[] args) {
	int n1;
	
	Scanner sc = new Scanner(System.in);
	n1 = sc.nextInt();
    
    System.out.print(n1 - 543);
	}
}