Dynamic Array - HackerRank

Solution to Dynamic Array:

function dynamicArray(N, queries) {
  const S = [];
  let lastAnswer = 0;
  const ans = [];
  for (let i = 0; i < N; i++) {
    S[i] = [];
  }

  queries.forEach((eachItem) => {
    const [q, x, y] = [...eachItem];
    console.log(q, x, y);
    const seq = (x ^ lastAnswer) % N;
    switch (q) {
      case 1:
        S[seq].push(y);
        break;
      case 2:
        const size = S[seq].length;
        const index = y % size;
        lastAnswer = S[seq][index];
        ans.push(lastAnswer);
        break;
      default:
        break;
    }
  });

  return ans;
}