export function find(
  haystack: number[],
  needle: number,
  start: number = 0,
  end: number = haystack.length - 1
): number | never {
  if (start > end || end < start) {
    throw new Error("Value not in array");
  }
  const index = start + Math.floor((end - start) / 2);
  const value = haystack[index];
  if (needle > value) {
    return find(haystack, needle, index + 1, end);
  }
  if (needle < value) {
    return find(haystack, needle, start, index - 1);
  }
  return index;
}