1
var removeDuplicates = function (s, k) {
2
  const stack = [];
3
  for (const c of s) {
4
    const obj = { count: 1, char: c };
5
    if (!stack.length) {
6
      stack.push(obj);
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      continue;
8
    }
9
    const top = stack[stack.length - 1];
10
    if (top.char === obj.char && obj.count + top.count === k) {
11
      let count = k;
12
      while (count > 1) {
13
        stack.pop();
14
        count--;
15
      }
16
    } else if (top.char === obj.char) {
17
      obj.count += top.count;
18
      stack.push(obj);
19
    } else {
20
      stack.push(obj);
21
    }
22
  }
23
  return stack.reduce((a, b) => a + b.char, "");
24
};