Validate Subsequences

function isValidSubsequence(arr, sequence) {
  let idx = 0;
  let seq = 0;
  
  while (seq < sequence.length && idx < arr.length) {
    const curr = sequence[seq];

    if (curr === arr[idx]) {
      seq++;
    }
    
    idx++;
  }

  if (sequence.length !== seq) {
    return false;
  }

  return true;
}

// Do not edit the line below.
exports.isValidSubsequence = isValidSubsequence;