diff --git "a/leetcode3/\354\240\225\354\247\204\354\230\201/125. Valid Palindrome" "b/leetcode3/\354\240\225\354\247\204\354\230\201/125. Valid Palindrome"
new file mode 100644
index 00000000..43c38fe6
--- /dev/null
+++ "b/leetcode3/\354\240\225\354\247\204\354\230\201/125. Valid Palindrome"	
@@ -0,0 +1,15 @@
+/**
+ * @param {string} s
+ * @return {boolean}
+ */
+var isPalindrome = function(s) {
+    s = s.toLowerCase().replace(/[^a-z0-9]/g, "");
+
+    let m = "";
+
+    for (let i = s.length -1; i >= 0; i--){
+        m += s[i];
+    }
+
+    return s == m;
+};
diff --git "a/leetcode3/\354\240\225\354\247\204\354\230\201/447. Number of Boomerangs" "b/leetcode3/\354\240\225\354\247\204\354\230\201/447. Number of Boomerangs"
new file mode 100644
index 00000000..3f70cf3d
--- /dev/null
+++ "b/leetcode3/\354\240\225\354\247\204\354\230\201/447. Number of Boomerangs"	
@@ -0,0 +1,19 @@
+/**
+ * @param {number[][]} points
+ * @return {number}
+ */
+var numberOfBoomerangs = function(points) {
+
+    for (let i = 0; i < points.length; i++){
+        for (let j = 0; j<points.length; j++){
+            let x1 = points[i][0];
+            let y1 = points[i][1];
+
+            let x2 = points[j][0];
+            let y2 = points[j][1];
+
+            let dis = (x2-x1)**2 + (y2-y1)**2;
+        }
+    }
+
+};