#pragma once

#include <iterator>

template<typename T, typename It, typename Tag>
It Find_(const T &value, It first, It last, Tag tag) {
  for (; first != last; ++first) {
	if (*first == value) {
	  return first;
	}
  }
  return last;
}

template<typename T, typename It>
It Find_(const T &value, It first, It last, std::random_access_iterator_tag) {
  It l = first;
  It r = last;
  while (l < r) {
	It mid = l + (r - l) / 2;
	if (value < *mid) {
	  r = mid;
	} else {
	  l = mid + 1;
	}
  }
  r--;
  if (*r == value) {
	return r;
  }
  return last;
}

template<typename T, typename It>
It Find(const T &value, It first, It last) {
  return Find_(value, first, last,
			   typename std::iterator_traits<It>::iterator_category());
}