BOJ 15661번 링크와 스타트

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

public class BOJ_15661 {

    static int[][] s;
    static int answer = Integer.MAX_VALUE;
    static boolean[] startTeam;
    static boolean[] linkTeam;


    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = Integer.parseInt(sc.nextLine());
        s = new int[n][n];
        startTeam = new boolean[n];
        linkTeam = new boolean[n];
        for (int i = 0; i < n; i++) {
            s[i] = Arrays.stream(sc.nextLine().split("\\s")).mapToInt(Integer::parseInt).toArray();
        }


        solve(n, 0, 0, 0);
        System.out.println(answer);
    }

    private static void solve(int n, int startCount, int linkCount, int index) {



        if (n == index) {

            if (startCount < 1 || linkCount < 1)
                return;

            int startSum = 0;
            int linkSum = 0;
            for (int i = 0; i < n; i++) {
                for (int j = 0; j < n; j++) {
                    if (startTeam[i] == true && startTeam[j] == true)
                        startSum += s[i][j];

                    if (linkTeam[i] == true && linkTeam[j] == true)
                        linkSum += s[i][j];
                }
            }

            int temp = Math.abs(startSum - linkSum);
            if (answer > temp)
                answer = temp;

            return;
        }

        startTeam[index] = true;
        solve(n, startCount + 1, linkCount, index + 1);
        startTeam[index] = false;
        linkTeam[index] = true;
        solve(n, startCount, linkCount + 1, index + 1);
        linkTeam[index] = false;

    }
}