From 4ac1dc454f1176e77daa6e8f3768434e2a4a7393 Mon Sep 17 00:00:00 2001
From: BangDori <qudwns8865@naver.com>
Date: Wed, 1 Jan 2025 19:37:55 +0900
Subject: [PATCH] [Leetcode - Easy] Number of Different Integers in a String

---
 ...umber of Different Integers in a String.js | 42 +++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 bangdori/Number of Different Integers in a String.js

diff --git a/bangdori/Number of Different Integers in a String.js b/bangdori/Number of Different Integers in a String.js
new file mode 100644
index 0000000..ea14361
--- /dev/null
+++ b/bangdori/Number of Different Integers in a String.js	
@@ -0,0 +1,42 @@
+const UNSPECIFIED = -1;
+
+/**
+ * @param {string} word
+ * @return {number}
+ */
+var numDifferentIntegers = function (word) {
+  let prevNumberPos = UNSPECIFIED;
+  const numberGroups = new Set();
+
+  for (let i = 0; i < word.length; i++) {
+    if (
+      isNumber(word[i]) &&
+      prevNumberPos !== UNSPECIFIED &&
+      word[prevNumberPos] !== "0"
+    ) {
+      continue;
+    }
+
+    if (isNumber(word[i])) {
+      prevNumberPos = i;
+      continue;
+    }
+
+    if (prevNumberPos === UNSPECIFIED) {
+      continue;
+    }
+
+    numberGroups.add(word.substring(prevNumberPos, i));
+    prevNumberPos = UNSPECIFIED;
+  }
+
+  if (prevNumberPos !== UNSPECIFIED) {
+    numberGroups.add(word.substring(prevNumberPos, word.length));
+  }
+
+  return numberGroups.size;
+};
+
+function isNumber(character) {
+  return character >= "0" && character <= "9";
+}