diff --git a/Men3_4.java b/Men3_4.java
new file mode 100644
index 0000000..957de3d
--- /dev/null
+++ b/Men3_4.java
@@ -0,0 +1,53 @@
+import java.util.Random;
+import java.util.Scanner;
+
+public class Men3_4 {
+    public static void main(String[] args) {
+
+        System.out.println("자동차의 개수를 입력하세요");
+        Scanner car = new Scanner(System.in);
+        int cars = car.nextInt();
+        int[] speed = new int[cars];
+
+        String[] name = new String[cars];
+        for (int i = 0; i < cars; i++) {
+            System.out.println(i + 1 + "번째 자동차의 스피드를 입력하세요");
+            Scanner speed1 = new Scanner(System.in);
+            speed[i] = speed1.nextInt();
+
+            System.out.println(i + 1 + "번째 자동차의 이름을 입력하세요");
+            Scanner name1 = new Scanner(System.in);
+            name[i] = name1.next();
+        }
+        System.out.println("-----경기 참가자 소개-----");
+        for (int i = 0; i < cars; i++) {
+            System.out.println("스피드는 " + speed[i] + "이고, 이름은 " + name[i]);
+        }
+
+        System.out.println("경기를 몇 초 동안 진행할까요?");
+        Scanner sec2 = new Scanner(System.in);
+        int sec3 = sec2.nextInt();
+
+        long seed = System.currentTimeMillis();
+        Random move1 = new Random(seed);
+
+        System.out.println(sec3);
+        int[] scores = new int[cars];
+
+        for (int i = 0; i < cars; i++) {
+            int score = 0;
+            for (int t = 0; t < sec3; t++) {
+                if (move1.nextInt(2) == 1) {
+                    score = score + speed[i];
+                    scores[i] = score;
+                }
+            }
+        }
+
+        System.out.println("---최종 결과 발표---");
+        for (int i = 0; i < cars; i++) {
+            System.out.println("점수: " + scores[i]);
+        }
+    }
+
+}
diff --git a/Men5.java b/Men5.java
new file mode 100644
index 0000000..376dac0
--- /dev/null
+++ b/Men5.java
@@ -0,0 +1,99 @@
+import java.util.ArrayList;
+import java.util.Random;
+import java.util.Scanner;
+
+class Car {
+    int speed;
+    int score;
+
+    int go(int i) {
+        score = score + i;
+        return score;
+    }
+
+    static void sayScore(int u, int[] i) { //점수 말하기
+        System.out.println("---최종 결과 발표---");
+
+        for (int k = 0; k < u; k++) {
+
+            System.out.println("scrore: " + i[k]);
+        }
+
+    }
+
+}
+
+class SuperCar extends Car {
+    //스피드 두배
+    @Override
+    int go(int i) {
+        i = i * 2;
+        super.go(i);
+        return score;
+    }
+
+//    @Override
+//    void sayScore() {
+//        super.sayScore(score);
+//    }
+}
+
+public class Men5 {
+    public static void main(String[] args) {
+        System.out.println("자동차의 개수를 입력하세요.");
+        Scanner car1 = new Scanner(System.in);
+        int car2 = car1.nextInt();
+        int[] speed = new int[car2];
+        String[] name = new String[car2];
+        int[] zero = new int[car2];
+
+        for (int i = 0; i < car2; i++) {
+            System.out.println((i + 1) + "번째 자동차의 스피드를 입력하세요");
+            Scanner speed2 = new Scanner(System.in);
+            speed[i] = speed2.nextInt();
+            System.out.println((i + 1) + "번째 자동차의 이름을 입력하세요");
+            Scanner name2 = new Scanner(System.in);
+            name[i] = name2.next();
+            System.out.println("이 자동차는 슈퍼카인가요? 0 또는 1 입력");
+            Scanner zero1 = new Scanner(System.in);
+            zero[i] = zero1.nextInt();
+
+        }
+        System.out.println("----경기 참가자 소개----");
+        for (int i = 0; i < car2; i++) {
+            System.out.println("스피드는" + speed[i] + "이고, 이름은 " + name[i]);
+        }
+        System.out.println("경기를 몇 초 동안 진행할까요?");
+        Scanner sec2 = new Scanner(System.in);
+        int sec = sec2.nextInt();
+
+        SuperCar supercar = new SuperCar();
+        Car car = new Car();
+
+        long seed = System.currentTimeMillis();
+        Random rand = new Random(seed);
+
+        int[] scores = new int[car2];
+
+        for (int i = 0; i < car2; i++) {
+            int score = 0;
+            for (int t = 0; t < sec; t++) {
+                if (rand.nextInt(2) == 1) {
+                    if (zero[i] == 1) {
+                        if (rand.nextInt(2) == 1) {
+                            supercar.go(speed[i]);
+                        }
+
+                    }
+                    scores[i] = car.go(speed[i]);
+                }
+            }
+        }
+
+        car.sayScore(car2, scores);
+    }
+
+
+}
+
+//스피드만큼 가는게 디폴트 ,, 만약 50%확률로 부스터 실행되면 스피드가 2배임
\ No newline at end of file
diff --git a/test.txt b/test.txt
new file mode 100644
index 0000000..9daeafb
--- /dev/null
+++ b/test.txt
@@ -0,0 +1 @@
+test