Wrong Answer

HashSet

Author: dungnguyen-art

J04006/src/main/java/com/mycompany/j04006/Khai_Bao.java

@@ -0,0 +1,30 @@
+package com.mycompany.j04006;
+
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+/**
+ *
+ * @author Admin //
+ */
+//import com.mycompany.j04006.J04006;
+import java.util.*;
+
+public class Khai_Bao {
+
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        int t = sc.nextInt();
+        while (t-- >0) {
+            String name = sc.nextLine();
+            String cls = sc.nextLine();
+            String date = sc.nextLine();
+            Float degree = sc.nextFloat();
+
+            Sinh_Vien sv = new Sinh_Vien(name, cls, date, degree);
+            sv.result();
+        }
+    }
+}

J04006/src/main/java/com/mycompany/j04006/Nhap.java

@@ -12,10 +12,10 @@
  */
 import java.text.SimpleDateFormat;
 import java.util.Date;
-public class J04006 {
-    String name,cls,date;
-    Float degree;
-    public J04006(String name, String cls,String date, Float degree){
+public class Sinh_Vien {
+    private String name,cls,date;
+    private Float degree;
+    public Sinh_Vien(String name, String cls,String date, Float degree){
         this.name = name;
         this.cls = cls;
         this.date = date;
@@ -32,6 +32,7 @@ public void result(){
          String degre = String.format("%.2f", this.degree);
 //        Date date = formatter.format(this.date);
         System.out.print("B20DCCN001 " + this.name + " " +this.cls + " " + date+" " + degre);
+        System.out.println("\n");
     }
 
 }

J04006/src/main/java/com/mycompany/j04006/J04006.java J04006/src/main/java/com/mycompany/j04006/Sinh_Vien.java

@@ -0,0 +1,37 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package com.mycompany.set_map;
+
+/**
+ *
+ * @author Admin
+ */
+import java.util.HashSet;
+import java.util.Scanner;
+import java.util.Arrays;
+public class J08012 {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        HashSet<Integer> hs_v = new HashSet<>();
+        HashSet<Integer> hs_e = new HashSet<>();
+        int n = sc.nextInt();
+        int tmp = n;
+        while (n-->1){
+            int[] arr = new int[2];
+            arr[0] = sc.nextInt();
+            arr[1] = sc.nextInt();
+            Arrays.sort(arr);
+            hs_v.add(arr[0]);
+            hs_e.add(arr[1]);
+        }
+        if(hs_v.size() == 1 && hs_e.size() == tmp-1){
+            System.out.println("Yes");
+        }
+        else{
+            System.out.println("No");
+        }
+    }
+}