diff --git "a/Doozuu/231212/pro_\354\204\261\352\262\251\354\234\240\355\230\225\352\262\200\354\202\254.js" "b/Doozuu/231212/pro_\354\204\261\352\262\251\354\234\240\355\230\225\352\262\200\354\202\254.js"
new file mode 100644
index 0000000..ef57c8c
--- /dev/null
+++ "b/Doozuu/231212/pro_\354\204\261\352\262\251\354\234\240\355\230\225\352\262\200\354\202\254.js"
@@ -0,0 +1,16 @@
+function solution(survey, choices) {
+  const map = new Map();
+  const types = ['RT', 'CF', 'JM', 'AN'].map((t) => t.split(''));
+
+  function SetScore(t1, t2, score) {
+    map.set(t1, (map.get(t1) || 0) + Math.abs(score - 4));
+    map.set(t2, map.get(t2) || 0);
+  }
+
+  survey.forEach(([t1, t2], i) => {
+    const score = choices[i];
+    score < 4 ? SetScore(t1, t2, score) : SetScore(t2, t1, score);
+  });
+
+  return types.map(([t1, t2]) => (map.get(t1) < map.get(t2) ? t2 : t1)).join('');
+}
diff --git "a/Doozuu/231212/pro_\354\226\221\352\263\274\353\212\221\353\214\200.js" "b/Doozuu/231212/pro_\354\226\221\352\263\274\353\212\221\353\214\200.js"
new file mode 100644
index 0000000..757b521
--- /dev/null
+++ "b/Doozuu/231212/pro_\354\226\221\352\263\274\353\212\221\353\214\200.js"
@@ -0,0 +1,28 @@
+function solution(info, edges) {
+  let answer = 0;
+  let connectedNode = Array.from({length: info.length}, () => []);
+
+  edges.forEach(([from, to]) => connectedNode[from].push(to));
+
+  function dfs(currentNode, sheep, wolf, possible) {
+    let newPossibles = [...possible];
+    let currentIndex = newPossibles.indexOf(currentNode);
+
+    info[currentNode] ? wolf++ : sheep++;
+
+    answer = Math.max(answer, sheep);
+
+    if (sheep === wolf) return;
+
+    newPossibles.push(...connectedNode[currentNode]);
+    newPossibles.splice(currentIndex, 1);
+
+    for (const nextNode of newPossibles) {
+      dfs(nextNode, sheep, wolf, newPossibles);
+    }
+  }
+
+  dfs(0, 0, 0, [0]);
+
+  return answer;
+}
diff --git "a/Doozuu/231212/pro_\354\235\264\353\252\250\355\213\260\354\275\230\355\225\240\354\235\270\355\226\211\354\202\254.js" "b/Doozuu/231212/pro_\354\235\264\353\252\250\355\213\260\354\275\230\355\225\240\354\235\270\355\226\211\354\202\254.js"
new file mode 100644
index 0000000..3557486
--- /dev/null
+++ "b/Doozuu/231212/pro_\354\235\264\353\252\250\355\213\260\354\275\230\355\225\240\354\235\270\355\226\211\354\202\254.js"
@@ -0,0 +1,32 @@
+function solution(users, emoticons) {
+  const discountRate = [10, 20, 30, 40];
+  const rates = [];
+  let result = [0, 0];
+
+  function DFS(depth, arr) {
+    if (depth === emoticons.length) return rates.push(arr);
+    for (let i = 0; i < discountRate.length; i++) {
+      DFS(depth + 1, arr.concat(discountRate[i]));
+    }
+  }
+  DFS(0, []);
+
+  for (const rate of rates) {
+    let [subscribers, sumPrice] = [0, 0];
+
+    for (const user of users) {
+      const [userRate, price] = user;
+      const ratedPrices = emoticons.reduce((acc, cur, idx) => {
+        if (rate[idx] >= userRate) return acc + cur * (1 - rate[idx] * 0.01);
+        return acc;
+      }, 0);
+
+      if (ratedPrices >= price) subscribers++;
+      else sumPrice += ratedPrices;
+    }
+
+    if (subscribers > result[0] || (subscribers === result[0] && sumPrice >= result[1])) result = [subscribers, sumPrice];
+  }
+
+  return result;
+}
diff --git "a/Doozuu/231212/pro_\355\214\214\354\235\274\353\252\205\354\240\225\353\240\254.js" "b/Doozuu/231212/pro_\355\214\214\354\235\274\353\252\205\354\240\225\353\240\254.js"
new file mode 100644
index 0000000..352e349
--- /dev/null
+++ "b/Doozuu/231212/pro_\355\214\214\354\235\274\353\252\205\354\240\225\353\240\254.js"
@@ -0,0 +1,29 @@
+function solution(files) {
+  function isNumber(n) {
+    return n !== ' ' && !Number.isNaN(Number(n));
+  }
+
+  function Seperate(name) {
+    let [head, number] = ['', ''];
+    for (let i = 0; i < name.length; i++) {
+      if (isNumber(name[i])) {
+        number += name[i];
+        if (!isNumber(name[i + 1])) break;
+      } else {
+        head += name[i];
+      }
+    }
+    return [head, Number(number)];
+  }
+
+  return files.sort((a, b) => {
+    const [head1, number1] = Seperate(a);
+    const [head2, number2] = Seperate(b);
+
+    if (head1.toUpperCase() === head2.toUpperCase()) {
+      if (number1 === number2) return;
+      return number1 - number2;
+    }
+    return head1.localeCompare(head2);
+  });
+}