[백준 java] 브론즈3/4493번 가위 바위 보?

https://www.acmicpc.net/problem/4493

4493번: 가위 바위 보?

import java.util.Scanner;
 
public class Main {
    static String f1;
    static String f2;
    static int f1_sum = 0;
    static int f2_sum = 0;
 
    public Main(String f1, String f2) {
        this.f1 = f1;
        this.f2 = f2;
 
    }
 
    public static void RPS() {
 
        if ((f1.equals("R") && f2.equals("S")) || (f1.equals("S") && f2.equals("P"))
                || (f1.equals("P") && f2.equals("R")))
 
        {
            f1_sum += 1;
        }
        if ((f1.equals("S") && f2.equals("R")) || (f1.equals("P") && f2.equals("S"))
                || (f1.equals("R") && f2.equals("P"))) {
            f2_sum += 1;
        }
 
        if ((f1.equals("S") && f2.equals("S")) || (f1.equals("P") && f2.equals("P"))
                || (f1.equals("R") && f2.equals("R"))) {
            f2_sum += 0;
            f1_sum += 0;
        }
    }
 
    public static void nums() {
        System.out.println(f1_sum);
        System.out.println(f2_sum);
    }
 
    public static String Cal() {
        if (f1_sum > f2_sum) {
            return "Player 1";
        } else if (f1_sum < f2_sum) {
            return "Player 2";
        } else if (f1_sum == f2_sum) {
            return "TIE";
        }
        return null;
 
    }
 
    public static void main(String[] args) throws java.lang.Exception {
 
        Scanner sc = new Scanner(System.in);
        int testCase = sc.nextInt();
        String[] s = new String[testCase];
 
        for (int i = 0; i < testCase; i++) {
            int num = sc.nextInt();
            f1_sum = 0;
            f2_sum = 0;
            for (int j = 0; j < num; j++) {
                Main player= new Main(sc.next(), sc.next());
 
                RPS();
                
 
            }
            s[i] = Cal();
 
        }
 
        for (String str : s) {
            System.out.println(str);
        }
 
    }
}