câu 3

public class main {

    public static void main(String[] args) {

        int B[] = {8, 4, 5, 10, 13, 15, 12};

        System.out.println(BaSoLonNhat(B));
    }

    public static String BaSoLonNhat(int B[]) {
        int max1 = 0, max2 = 0, max3 = 0;
        int dem = 0;
        int vt = 0, vt1 = 0;

        for (int i = 0; dem < 3; i++) {
            if (dem == 0) {
                if (max1 <= B[i]) {

                    max1 = B[i];
                    vt = i;
                }
            }
            if (dem == 1) {
                if (max2 <= B[i] && i != vt) {

                    max2 = B[i];
                    vt1 = i;
                }
            }
            if (dem == 2) {
                if (max3 <= B[i] && i != vt && i != vt1) {

                    max3 = B[i];
                }
            }
            if (i == B.length - 1) {
                i = 0;
                dem += 1;
            }
        }
        return max1 + " " + max2 + " " + max3;
    }
}