💻 [chatgpt] Runtime 55 ms Beats 72.24% Memory 41.3 MB Beats 94.43%

Author: enkr1

394/chatgpt_solution.js

@@ -0,0 +1,24 @@
+const decodeString = (s) => {
+  const stack = [];
+  let currentNum = 0;
+  let currentStr = '';
+
+  for (let ch of s) {
+    if (ch >= '0' && ch <= '9') {
+      currentNum = currentNum * 10 + parseInt(ch);
+    } else if (ch === '[') {
+      stack.push(currentStr);
+      stack.push(currentNum);
+      currentNum = 0;
+      currentStr = '';
+    } else if (ch === ']') {
+      let num = stack.pop();
+      let prevStr = stack.pop();
+      currentStr = prevStr + currentStr.repeat(num);
+    } else {
+      currentStr += ch;
+    }
+  }
+
+  return currentStr;
+};