[JAVA]코드업 1086번 ~ 1090번

1086번

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class Main {
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));

		String[] numbers = br.readLine().split(" ");

		int w = Integer.parseInt(numbers[0]);
		int h = Integer.parseInt(numbers[1]);
		int b = Integer.parseInt(numbers[2]);

		double mb = w * h * b;
		mb = mb / 8 / 1024 / 1024;

		bw.write(String.format("%.2f MB", mb));
		bw.flush();
		bw.close();

	}
}

 

1087번

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class Main {
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));

		int num = Integer.parseInt(br.readLine());

		int sum = 0;
		int n = 1;

		while (sum < num) {
			sum = sum + n;
			n++;
		}

		bw.write(String.valueOf(sum));
		bw.flush();
		bw.close();

	}
}

 

1088번

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class Main {
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));

		int num = Integer.parseInt(br.readLine());

		for (int i = 0; i <= num; i++) {
			if (i % 3 != 0) {
				bw.write(String.valueOf(i) + " ");
			}
		}

		bw.flush();
		bw.close();

	}
}

 

1089번

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class Main {
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));

		String[] numbers = br.readLine().split(" ");

		int a = Integer.parseInt(numbers[0]);
		int d = Integer.parseInt(numbers[1]);
		int n = Integer.parseInt(numbers[2]);

		int result = d * (n - 1) + a;

		bw.write(String.valueOf(result));
		bw.flush();
		bw.close();

	}
}

 

1090번

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class Main {
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));

		String[] numbers = br.readLine().split(" ");

		int a = Integer.parseInt(numbers[0]);
		int r = Integer.parseInt(numbers[1]);
		int n = Integer.parseInt(numbers[2]);

		long result = (a * (long) Math.pow(r, n - 1));

		bw.write(String.valueOf(result));
		bw.flush();
		bw.close();

	}
}