백준25206: 너의 평점은

문제

https://www.acmicpc.net/problem/25206

문제 풀이

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        HashMap<String, Double> map = new HashMap<>();
        map.put("A+", 4.5);
        map.put("A0", 4.0);
        map.put("B+", 3.5);
        map.put("B0", 3.0);
        map.put("C+", 2.5);
        map.put("C0", 2.0);
        map.put("D+", 1.5);
        map.put("D0", 1.0);
        map.put("F", 0.0);

        double sum = 0;
        double sumScore = 0;
        for (int i = 0; i < 20; i++) {
            String subject = sc.next();
            double score = sc.nextDouble();
            String grade = sc.next();

            if (grade.equals("P")) {
                continue;
            }

            sum += map.get(grade) * score;
            sumScore += score;
        }
        System.out.println(sum / sumScore);
    }
}