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";
+}