diff --git a/sort/Code_10814.java b/sort/Code_10814.java
new file mode 100644
index 0000000..be7ef77
--- /dev/null
+++ b/sort/Code_10814.java
@@ -0,0 +1,74 @@
+package sort;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+/*
+ * ÀÛ¼ºÀÏ : 2018³â 08¿ù 16ÀÏ
+ * ³» ¿ë : ³ªÀ̼ø Á¤·Ä
+ */
+public class Code_10814 {
+
+	public static void main(String[] args) throws NumberFormatException, IOException {
+		// TODO Auto-generated method stub
+		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+		
+		int n = Integer.parseInt(br.readLine());
+		
+		List<Person> list = new ArrayList<Person>();
+		
+		for(int i=0; i<n; ++i) {
+			String[] s = br.readLine().split(" ");
+			Person p = new Person();
+			p.age = Integer.parseInt(s[0]);
+			p.name = s[1];
+			p.join = i;
+			list.add(p);
+		}
+		
+		Collections.sort(list);
+		
+		for(Person p : list)
+			System.out.println(p);
+	}
+
+}
+//1.°¡ÀÔÇÑ ¼ø¼­¸¦ personº¯¼ö¿¡ ³Ö´Â´Ù 2.stable sortingÀ» »ç¿ëÇÑ´Ù.
+class Person implements Comparable<Person>{
+	int age;
+	String name;
+	int join;
+	public int getAge() {
+		return age;
+	}
+	public void setAge(int age) {
+		this.age = age;
+	}
+	public String getName() {
+		return name;
+	}
+	public void setName(String name) {
+		this.name = name;
+	}
+	public int getJoin() {
+		return join;
+	}
+	public void setJoin(int join) {
+		this.join = join;
+	}
+	
+	@Override
+	public String toString() {
+		return this.getAge()+" "+this.getName();
+	}
+	
+	@Override
+	public int compareTo(Person p) {
+		int r = this.age-p.age;
+		if(r!=0) return r;
+		return this.join-p.join;
+	}
+}
\ No newline at end of file
diff --git a/sort/Code_10825.java b/sort/Code_10825.java
new file mode 100644
index 0000000..ce56c82
--- /dev/null
+++ b/sort/Code_10825.java
@@ -0,0 +1,86 @@
+package sort;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+/*
+ * ÀÛ¼ºÀÏ : 2018³â 08¿ù 16ÀÏ
+ * ³» ¿ë : ±¹¿µ¼ö
+ */
+public class Code_10825 {
+
+	public static void main(String[] args) throws NumberFormatException, IOException {
+		// TODO Auto-generated method stub
+		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+		
+		int n = Integer.parseInt(br.readLine());
+		
+		List<Student> list = new ArrayList<Student>();
+		
+		for(int i=0; i<n; ++i) {
+			String[] s = br.readLine().split(" ");
+			Student st = new Student();
+			String name = s[0];
+			int ko = Integer.parseInt(s[1]);
+			int eng = Integer.parseInt(s[2]);
+			int math = Integer.parseInt(s[3]);
+			st.ko = ko;
+			st.eng = eng;
+			st.math = math;
+			st.name = name;
+			list.add(st);
+		}
+		
+		Collections.sort(list);
+		
+		for(Student s : list)
+			System.out.println(s.getName());
+	}
+}
+
+class Student implements Comparable<Student>{
+	int ko;
+	int math;
+	int eng;
+	String name;
+	public int getKo() {
+		return ko;
+	}
+	public void setKo(int ko) {
+		this.ko = ko;
+	}
+	public int getMath() {
+		return math;
+	}
+	public void setMath(int math) {
+		this.math = math;
+	}
+	public int getEng() {
+		return eng;
+	}
+	public void setEng(int eng) {
+		this.eng = eng;
+	}
+	public String getName() {
+		return name;
+	}
+	public void setName(String name) {
+		this.name = name;
+	}
+	
+	@Override
+	public int compareTo(Student s) {
+		int r = s.ko - this.ko; //±¹¾îÁ¡¼ö°¡ °¨¼ÒÇÏ´Â ¼ø
+		if(r==0) {
+			r = this.eng - s.eng; //¿µ¾îÁ¡¼ö°¡ Áõ°¡ÇÏ´Â ¼ø
+			if(r==0)
+				r = s.math - this.math; //¼öÇÐÁ¡¼ö°¡ °¨¼ÒÇÏ´Â ¼ø
+			if(r==0)
+				r = this.name.compareTo(s.name);
+		}
+		return r;
+	}
+}
\ No newline at end of file
diff --git a/sort/Code_2751.java b/sort/Code_2751.java
new file mode 100644
index 0000000..447f748
--- /dev/null
+++ b/sort/Code_2751.java
@@ -0,0 +1,30 @@
+package sort;
+
+import java.util.Arrays;
+import java.util.Scanner;
+/*
+ * ÀÛ¼ºÀÏ : 2018³â 08¿ù 16ÀÏ
+ * ³» ¿ë : ¼ö Á¤·ÄÇϱâ2
+ */
+public class Code_2751 {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		
+		Scanner sc = new Scanner(System.in);
+		
+		int num = sc.nextInt();
+		
+		int[] arr = new int[num];
+		
+		for(int i=0; i<num; ++i) {
+			arr[i] = sc.nextInt();
+		}
+		
+		Arrays.sort(arr);
+	
+		for(int i : arr)
+			System.out.println(i);
+	}
+
+}