Palindromic Substrings

palindromic-substrings/hyejjun.js

@@ -0,0 +1,32 @@
+/**
+ * @param {string} s
+ * @return {number}
+ */
+var countSubstrings = function (s) {
+    let count = 0;
+
+    function checkPalindromic(left, right) {
+        while (left >= 0 && right < s.length && s[left] === s[right]) {
+            count++;
+            left--;
+            right++;
+        }
+
+    }
+
+    for (let i = 0; i < s.length; i++) {
+        checkPalindromic(i, i);
+        checkPalindromic(i, i + 1);
+    }
+
+    return count;
+};
+
+console.log(countSubstrings("abc"));
+console.log(countSubstrings("aaa"));
+
+
+/*
+Time Complexity : O(n^2)
+Space Complexity: O(1)
+*/