diff --git "a/Moonjonghoo/hash/A\353\241\234 B\353\247\214\353\223\244\352\270\260.js" "b/Moonjonghoo/hash/A\353\241\234 B\353\247\214\353\223\244\352\270\260.js"
new file mode 100644
index 0000000..e9f1e33
--- /dev/null
+++ "b/Moonjonghoo/hash/A\353\241\234 B\353\247\214\353\223\244\352\270\260.js"	
@@ -0,0 +1,28 @@
+function solution(before, after) {
+  let hash1 = new Map();
+  let hash2 = new Map();
+
+  for (let i = 0; i < before.length; i++) {
+    hash1.set(before[i], (hash1.get(before[i]) || 0) + 1);
+    hash2.set(after[i], (hash2.get(after[i]) || 0) + 1);
+  }
+
+  // Map 비교 함수
+  function compareMaps(map1, map2) {
+    if (map1.size !== map2.size) return false; // 크기 비교
+    for (let [key, value] of map1) {
+      if (map2.get(key) !== value) return false; // 키-값 비교
+    }
+    return true;
+  }
+
+  // 비교 결과 반환
+  return compareMaps(hash1, hash2) ? 1 : 0;
+}
+
+console.log(solution("olleh", "hello")); // 1
+console.log(solution("apple", "ppale")); // 0
+
+console.log(solution("olleh", "hello"));
+
+//바꿀수있다는것은 구성 요소의 종류와 개수가 같으면됩니다.
diff --git "a/Moonjonghoo/hash/\353\223\261\354\210\230 \353\247\244\352\270\260\352\270\260.js" "b/Moonjonghoo/hash/\353\223\261\354\210\230 \353\247\244\352\270\260\352\270\260.js"
new file mode 100644
index 0000000..7648303
--- /dev/null
+++ "b/Moonjonghoo/hash/\353\223\261\354\210\230 \353\247\244\352\270\260\352\270\260.js"	
@@ -0,0 +1,10 @@
+function solution(score) {
+  // 각 학생의 평균 점수 계산
+  const averages = score.map(([eng, math]) => (eng + math) / 2);
+
+  // 평균 점수를 내림차순으로 정렬하여 등수 매기기
+  const sorted = [...averages].sort((a, b) => b - a);
+
+  // 원래 평균 점수 배열의 각 값이 정렬된 배열에서 몇 번째 순위인지 계산
+  return averages.map((avg) => sorted.indexOf(avg) + 1);
+}
diff --git "a/Moonjonghoo/hash/\353\252\250\354\212\244\353\266\200\355\230\270(1).js" "b/Moonjonghoo/hash/\353\252\250\354\212\244\353\266\200\355\230\270(1).js"
new file mode 100644
index 0000000..a66a7ee
--- /dev/null
+++ "b/Moonjonghoo/hash/\353\252\250\354\212\244\353\266\200\355\230\270(1).js"
@@ -0,0 +1,41 @@
+function solution(letter) {
+  var answer = "";
+  let morse = {
+    ".-": "a",
+    "-...": "b",
+    "-.-.": "c",
+    "-..": "d",
+    ".": "e",
+    "..-.": "f",
+    "--.": "g",
+    "....": "h",
+    "..": "i",
+    ".---": "j",
+    "-.-": "k",
+    ".-..": "l",
+    "--": "m",
+    "-.": "n",
+    "---": "o",
+    ".--.": "p",
+    "--.-": "q",
+    ".-.": "r",
+    "...": "s",
+    "-": "t",
+    "..-": "u",
+    "...-": "v",
+    ".--": "w",
+    "-..-": "x",
+    "-.--": "y",
+    "--..": "z",
+  };
+
+  let arr = letter.split(" ");
+  for (let i = 0; i < arr.length; i++) {
+    if (morse.hasOwnProperty(arr[i])) {
+      answer += morse[arr[i]];
+    }
+  }
+  return answer;
+}
+
+console.log(solution(".... . .-.. .-.. ---"));
diff --git "a/Moonjonghoo/hash/\354\231\204\354\243\274\355\225\230\354\247\200\353\252\273\355\225\234\354\204\240\354\210\230.js" "b/Moonjonghoo/hash/\354\231\204\354\243\274\355\225\230\354\247\200\353\252\273\355\225\234\354\204\240\354\210\230.js"
new file mode 100644
index 0000000..e69de29
diff --git "a/Moonjonghoo/hash/\354\247\204\353\243\214\354\210\234\354\204\234.js" "b/Moonjonghoo/hash/\354\247\204\353\243\214\354\210\234\354\204\234.js"
new file mode 100644
index 0000000..5a55b55
--- /dev/null
+++ "b/Moonjonghoo/hash/\354\247\204\353\243\214\354\210\234\354\204\234.js"
@@ -0,0 +1,16 @@
+function solution(emergency) {
+  var answer = [];
+  let newarr = emergency.slice();
+  newarr.sort((a, b) => b - a);
+  let map = new Map();
+  for (let i = 0; i < newarr.length; i++) {
+    map.set(newarr[i], i + 1);
+  }
+  for (let i = 0; i < emergency.length; i++) {
+    let number = map.get(emergency[i]);
+    answer.push(number);
+  }
+  return answer;
+}
+
+console.log(solution([3, 76, 24]));
diff --git "a/Moonjonghoo/queue/\353\241\234\352\267\270\354\235\270_\354\204\261\352\263\265.js" "b/Moonjonghoo/queue/\353\241\234\352\267\270\354\235\270_\354\204\261\352\263\265.js"
new file mode 100644
index 0000000..fa29f76
--- /dev/null
+++ "b/Moonjonghoo/queue/\353\241\234\352\267\270\354\235\270_\354\204\261\352\263\265.js"
@@ -0,0 +1,11 @@
+function solution(id_pw, db) {
+  const [id, pw] = id_pw;
+
+  for (const [dbId, dbPw] of db) {
+    if (id === dbId) {
+      return pw === dbPw ? "login" : "wrong pw";
+    }
+  }
+
+  return "fail";
+}
diff --git "a/Moonjonghoo/queue/\354\210\234\354\204\234\354\214\215\354\235\230_\352\260\234\354\210\230.js" "b/Moonjonghoo/queue/\354\210\234\354\204\234\354\214\215\354\235\230_\352\260\234\354\210\230.js"
new file mode 100644
index 0000000..026633e
--- /dev/null
+++ "b/Moonjonghoo/queue/\354\210\234\354\204\234\354\214\215\354\235\230_\352\260\234\354\210\230.js"
@@ -0,0 +1,14 @@
+function solution(n) {
+  let count = 0;
+
+  for (let i = 1; i <= Math.sqrt(n); i++) {
+    if (n % i === 0) {
+      count++; // i가 약수
+      if (i !== n / i) {
+        count++; // i가 n의 제곱근이 아니면 나머지 짝도 추가
+      }
+    }
+  }
+
+  return count;
+}
diff --git "a/Moonjonghoo/queue/\354\240\220\354\235\230_\354\234\204\354\271\230_\352\265\254\355\225\230\352\270\260.js" "b/Moonjonghoo/queue/\354\240\220\354\235\230_\354\234\204\354\271\230_\352\265\254\355\225\230\352\270\260.js"
new file mode 100644
index 0000000..e05495c
--- /dev/null
+++ "b/Moonjonghoo/queue/\354\240\220\354\235\230_\354\234\204\354\271\230_\352\265\254\355\225\230\352\270\260.js"
@@ -0,0 +1,8 @@
+function solution(dot) {
+  const [x, y] = dot;
+
+  if (x > 0 && y > 0) return 1; // 1사분면
+  if (x < 0 && y > 0) return 2; // 2사분면
+  if (x < 0 && y < 0) return 3; // 3사분면
+  if (x > 0 && y < 0) return 4; // 4사분면
+}
diff --git "a/Moonjonghoo/queue/\355\212\271\354\235\264\355\225\234_\354\240\225\353\240\254.js" "b/Moonjonghoo/queue/\355\212\271\354\235\264\355\225\234_\354\240\225\353\240\254.js"
new file mode 100644
index 0000000..23ce50a
--- /dev/null
+++ "b/Moonjonghoo/queue/\355\212\271\354\235\264\355\225\234_\354\240\225\353\240\254.js"
@@ -0,0 +1,11 @@
+function solution(numlist, n) {
+  return numlist.sort((a, b) => {
+    const diffA = Math.abs(a - n);
+    const diffB = Math.abs(b - n);
+
+    if (diffA === diffB) {
+      return b - a; 
+    }
+    return diffA - diffB; 
+  });
+}
diff --git "a/Moonjonghoo/queue/\355\224\204\353\241\234\354\204\270\354\212\244.js" "b/Moonjonghoo/queue/\355\224\204\353\241\234\354\204\270\354\212\244.js"
new file mode 100644
index 0000000..2289304
--- /dev/null
+++ "b/Moonjonghoo/queue/\355\224\204\353\241\234\354\204\270\354\212\244.js"
@@ -0,0 +1,17 @@
+function solution(priorities, location) {
+  let order = 0;
+
+  while (priorities.length > 0) {
+    const current = priorities.shift();
+    if (priorities.some((priority) => priority > current)) {
+      priorities.push(current);
+      location = location === 0 ? priorities.length - 1 : location - 1;
+    } else {
+      order++;
+      if (location === 0) {
+        return order; // 목표 프로세스가 실행되었을 때 순서를 반환
+      }
+      location--;
+    }
+  }
+}
diff --git "a/Moonjonghoo/set/\353\254\264\354\236\221\354\234\204\353\241\234_K\352\260\234\354\235\230_\354\210\230_\353\275\221\352\270\260.js" "b/Moonjonghoo/set/\353\254\264\354\236\221\354\234\204\353\241\234_K\352\260\234\354\235\230_\354\210\230_\353\275\221\352\270\260.js"
new file mode 100644
index 0000000..2c5ec77
--- /dev/null
+++ "b/Moonjonghoo/set/\353\254\264\354\236\221\354\234\204\353\241\234_K\352\260\234\354\235\230_\354\210\230_\353\275\221\352\270\260.js"
@@ -0,0 +1,22 @@
+function solution(arr, k) {
+  var answer = [];
+  for (let i = 0; i < arr.length; i++) {
+    if (!answer.includes(arr[i])) {
+      answer.push(arr[i]);
+    }
+  }
+
+  if (answer.length > k) {
+    return answer.slice(0, k);
+  } else if (answer.length < k) {
+    while (answer.length !== k) {
+      answer.push(-1);
+    }
+    return answer;
+  } else {
+    return answer;
+  }
+}
+
+console.log(solution([0, 1, 1, 2, 2, 3], 5));
+console.log(solution([0, 1, 1, 1, 1], 4));
diff --git "a/Moonjonghoo/set/\354\206\214\354\235\270\354\210\230\353\266\204\355\225\264.js" "b/Moonjonghoo/set/\354\206\214\354\235\270\354\210\230\353\266\204\355\225\264.js"
new file mode 100644
index 0000000..5ec8197
--- /dev/null
+++ "b/Moonjonghoo/set/\354\206\214\354\235\270\354\210\230\353\266\204\355\225\264.js"
@@ -0,0 +1,17 @@
+function solution(n) {
+  var answer = [];
+  let division = 2;
+  while (n !== 1) {
+    if (n % division === 0) {
+      n = n / division;
+      answer.push(division);
+    } else {
+      division++;
+    }
+  }
+  return Array.from(new Set(answer));
+}
+
+console.log(solution(12)); // 기대값: [2, 3]
+console.log(solution(17)); // 기대값: [17]
+console.log(solution(420)); // 기대값: [2, 3, 5, 7]
diff --git "a/Moonjonghoo/set/\354\244\221\353\263\265\353\220\234_\353\254\270\354\236\220_\354\240\234\352\261\260.js" "b/Moonjonghoo/set/\354\244\221\353\263\265\353\220\234_\353\254\270\354\236\220_\354\240\234\352\261\260.js"
new file mode 100644
index 0000000..bc59693
--- /dev/null
+++ "b/Moonjonghoo/set/\354\244\221\353\263\265\353\220\234_\353\254\270\354\236\220_\354\240\234\352\261\260.js"
@@ -0,0 +1,14 @@
+function solution(my_string) {
+  var answer = "";
+  let set = [];
+  for (let i = 0; i < my_string.length; i++) {
+    if (!set.includes(my_string[i])) {
+      set.push(my_string[i]);
+      answer += my_string[i];
+    }
+  }
+  return answer;
+}
+
+console.log(solution("people")); // 기대값: "peol"
+console.log(solution("We are the world")); // 기대값: "We arthwold"
diff --git "a/Moonjonghoo/set/\355\225\234_\353\262\210\353\247\214_\353\223\261\354\236\245\355\225\234_\353\254\270\354\236\220.js" "b/Moonjonghoo/set/\355\225\234_\353\262\210\353\247\214_\353\223\261\354\236\245\355\225\234_\353\254\270\354\236\220.js"
new file mode 100644
index 0000000..71eb990
--- /dev/null
+++ "b/Moonjonghoo/set/\355\225\234_\353\262\210\353\247\214_\353\223\261\354\236\245\355\225\234_\353\254\270\354\236\220.js"
@@ -0,0 +1,44 @@
+// function solution(s) {
+//   var answer = "";
+//   let arr = [];
+//   for (let i = 0; i < s.length; i++) {
+//     if (!arr.includes(s[i])) {
+//       arr.push(s[i]);
+//     } else {
+//       arr = arr.filter((e) => e !== s[i]);
+//     }
+//   }
+
+//   answer = arr.sort().join("");
+//   return answer;
+// }
+
+// console.log(solution("abcabcadc")); // 기대값: "d"
+// console.log(solution("abdc")); // 기대값: "abdc"
+// console.log(solution("hello")); // 기대값: "eho"
+// console.log(solution("hlelo"));
+
+function solution(s) {
+  var answer = "";
+  let arr = [];
+  let hash = new Map();
+  for (let i = 0; i < s.length; i++) {
+    if (!hash.get(s[i])) {
+      hash.set(s[i], 1);
+    } else {
+      hash.set(s[i], hash.get(s[i]) + 1);
+    }
+  }
+  for (let [key, value] of hash) {
+    if (value === 1) {
+      arr.push(key);
+    }
+  }
+  answer = arr.sort().join("");
+  if (arr.length === 0) return "";
+  return answer;
+}
+
+console.log(solution("abcabcadc")); // 기대값: "d"
+console.log(solution("abdc")); // 기대값: "abdc"
+console.log(solution("hello")); // 기대값: "eho"
diff --git a/Moonjonghoo/tree/Invert_Binary_tree.js b/Moonjonghoo/tree/Invert_Binary_tree.js
new file mode 100644
index 0000000..d5a90fd
--- /dev/null
+++ b/Moonjonghoo/tree/Invert_Binary_tree.js
@@ -0,0 +1,16 @@
+var invertTree = function (root) {
+  if (root === null) {
+    return null;
+  }
+
+  // 왼쪽과 오른쪽 자식 노드를 교환
+  const temp = root.left;
+  root.left = root.right;
+  root.right = temp;
+
+  // 재귀적으로 자식 노드들을 반전
+  invertTree(root.left);
+  invertTree(root.right);
+
+  return root;
+};
diff --git a/Moonjonghoo/tree/binary_tree_inorder_traversal.js b/Moonjonghoo/tree/binary_tree_inorder_traversal.js
new file mode 100644
index 0000000..bd8c1ae
--- /dev/null
+++ b/Moonjonghoo/tree/binary_tree_inorder_traversal.js
@@ -0,0 +1,13 @@
+var inorderTraversal = function (root) {
+  const result = [];
+
+  const traverse = (node) => {
+    if (node === null) return;
+    traverse(node.left); // 왼쪽 서브트리 방문
+    result.push(node.val); // 현재 노드 방문
+    traverse(node.right); // 오른쪽 서브트리 방문
+  };
+
+  traverse(root);
+  return result;
+};
diff --git a/Moonjonghoo/tree/maximum_depth_of_binary_tree.js b/Moonjonghoo/tree/maximum_depth_of_binary_tree.js
new file mode 100644
index 0000000..a268ad9
--- /dev/null
+++ b/Moonjonghoo/tree/maximum_depth_of_binary_tree.js
@@ -0,0 +1,18 @@
+/**
+ * Definition for a binary tree node.
+ * function TreeNode(val, left, right) {
+ *     this.val = (val===undefined ? 0 : val)
+ *     this.left = (left===undefined ? null : left)
+ *     this.right = (right===undefined ? null : right)
+ * }
+ */
+/**
+ * @param {TreeNode} root
+ * @return {number}
+ */
+var maxDepth = function (root) {
+  if (!root) return 0;
+  return Math.max(maxDepth(root.left), maxDepth(root.right)) + 1;
+};
+
+console.log(maxDepth);
diff --git a/Moonjonghoo/tree/same_tree.js b/Moonjonghoo/tree/same_tree.js
new file mode 100644
index 0000000..cb4c6fc
--- /dev/null
+++ b/Moonjonghoo/tree/same_tree.js
@@ -0,0 +1,16 @@
+var isSameTree = function (p, q) {
+  // 두 노드가 모두 null인 경우
+  if (p === null && q === null) {
+    return true;
+  }
+  // 한 노드만 null인 경우
+  if (p === null || q === null) {
+    return false;
+  }
+  // 노드의 값이 다른 경우
+  if (p.val !== q.val) {
+    return false;
+  }
+  // 왼쪽 및 오른쪽 서브트리를 재귀적으로 비교
+  return isSameTree(p.left, q.left) && isSameTree(p.right, q.right);
+};