diff --git "a/leetcode3/\355\231\251\354\235\200\354\247\200/1886. Determine Whether Matrix Can Be Obtained By Rotation.js" "b/leetcode3/\355\231\251\354\235\200\354\247\200/1886. Determine Whether Matrix Can Be Obtained By Rotation.js"
new file mode 100644
index 00000000..65545c52
--- /dev/null
+++ "b/leetcode3/\355\231\251\354\235\200\354\247\200/1886. Determine Whether Matrix Can Be Obtained By Rotation.js"	
@@ -0,0 +1,49 @@
+/**
+ * @param {number[][]} mat
+ * @param {number[][]} target
+ * @return {boolean}
+ */
+var findRotation = function(mat, target) {
+    // 90도씩 돌려가면서 비교해보면 된다.
+    const n=mat.length;
+    let flag;
+    for(let turn=0;turn<4;turn++){
+        // 같은지 검사
+        flag=true;
+        for(let i=0;i<n;i++){
+            for(let j=0;j<n;j++){
+                if(mat[i][j]!==target[i][j]){
+                    flag=false;
+                    break;
+                } 
+            }
+            if(!flag) break;
+        }
+
+        if(flag) return true;
+
+        // 회전
+        const temp=Array.from({length:n},()=>Array(n));
+        for(let i=0;i<n;i++){
+            for(let j=0;j<n;j++){
+                temp[i][j]=mat[j][n-i-1];
+            }
+        }
+        mat=temp;
+    console.log(mat);
+    }
+
+    // 마지막 처리
+    flag=true;
+    for(let i=0;i<n;i++){
+        for(let j=0;j<n;j++){
+            if(mat[i][j]!==target[i][j]){
+                flag=false;
+                break;
+            } 
+        }
+        if(!flag) break;
+    }
+
+    return flag;
+};
\ No newline at end of file
diff --git "a/leetcode3/\355\231\251\354\235\200\354\247\200/894. All Possible Full Binary Trees.js" "b/leetcode3/\355\231\251\354\235\200\354\247\200/894. All Possible Full Binary Trees.js"
new file mode 100644
index 00000000..e25bc68f
--- /dev/null
+++ "b/leetcode3/\355\231\251\354\235\200\354\247\200/894. All Possible Full Binary Trees.js"	
@@ -0,0 +1,20 @@
+/**
+ * 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 {number} n
+ * @return {TreeNode[]}
+ */
+var allPossibleFBT = function (n) {
+  const count = Math.floor(n / 2);
+  const result = [];
+
+  if (n === 1) [new TreeNode(0)];
+
+  return false;
+};