a

ticket/Test.java

@@ -10,6 +10,9 @@ public class Test {
         boolean continueBuy = true;
         Scanner sc = new Scanner(System.in);
         while (continueBuy) {
+            System.out.println("Ticket Seller: Five Yuan - " + ts.getFive() + ", Ten Yuan - " + ts.getTen()
+                    + ", Twenty Yuan - " + ts.getTwenty() + ", Fifty Yuan - " + ts.getFifty() + ", Hundred Yuan - "
+                    + ts.getHundred());
             System.out.print("Please enter your name: ");
             name = sc.nextLine();
             System.out.print("Please enter your payment: ");
@@ -17,7 +20,7 @@ public class Test {
             Thread consumer = new Thread(ts, name + "-" + payment);
             consumer.start();
             try {
-                consumer.join();
+                Thread.sleep(1000);
             } catch (InterruptedException e) {
                 e.printStackTrace();
             }

ticket/TicketSeller.java

@@ -44,15 +44,52 @@ public class TicketSeller implements Runnable {
                     }
                     break;
                 case 50:
-                    if (ten > 0 && five > 0) {
-                        ten--;
+                    if (twenty > 1 && five > 0) {
+                        twenty -= 2;
                         five--;
                         fifty++;
                         success = true;
-                    } else if (five >= 3) {
+                    } else if (ten > 1 && twenty > 0 && five > 0) {
+                        ten -= 2;
+                        twenty--;
+                        five--;
+                        fifty++;
+                        success = true;
+                    } else if (ten > 3 && five > 0) {
+                        ten -= 4;
+                        five--;
+                        fifty++;
+                        success = true;
+                    } else if (twenty > 0 && ten > 0 && five > 2) {
+                        twenty--;
+                        ten--;
                         five -= 3;
                         fifty++;
                         success = true;
+                    } else if (ten > 2 && five > 2) {
+                        ten -= 3;
+                        five -= 3;
+                        fifty++;
+                        success = true;
+                    } else if (twenty > 0 && five > 4) {
+                        twenty--;
+                        five -= 4;
+                        fifty++;
+                        success = true;
+                    } else if (ten > 1 && five > 4) {
+                        ten -= 2;
+                        five -= 4;
+                        fifty++;
+                        success = true;
+                    } else if (ten > 0 && five > 6) {
+                        ten--;
+                        five -= 6;
+                        fifty++;
+                        success = true;
+                    } else if (five > 9) {
+                        five -= 10;
+                        fifty++;
+                        success = true;
                     }
                     break;
                 default:
@@ -71,4 +108,44 @@ public class TicketSeller implements Runnable {
             }
         }
     }
+
+    public int getFive() {
+        return five;
+    }
+
+    public void setFive(int five) {
+        this.five = five;
+    }
+
+    public int getTen() {
+        return ten;
+    }
+
+    public void setTen(int ten) {
+        this.ten = ten;
+    }
+
+    public int getTwenty() {
+        return twenty;
+    }
+
+    public void setTwenty(int twenty) {
+        this.twenty = twenty;
+    }
+
+    public int getFifty() {
+        return fifty;
+    }
+
+    public void setFifty(int fifty) {
+        this.fifty = fifty;
+    }
+
+    public int getHundred() {
+        return hundred;
+    }
+
+    public void setHundred(int hundred) {
+        this.hundred = hundred;
+    }
 }

ticket/combinations.py

@@ -0,0 +1,12 @@
+def find_combinations():
+    combinations = []
+    for i in range(10):
+        for j in range(5):
+            for k in range(3):
+                if 5 * i + 10 * j + 20 * k == 45:
+                    combinations.append((i, j, k))
+    return combinations
+
+
+combinations = find_combinations()
+print(f"The combinations of 5, 10, and 20 that sum up to 45 are: {combinations}")