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#pragma once
#include "common.h"
namespace aoc2015 {
enum class dir { up, down, left, right };
struct house {
int x;
int y;
bool operator<(const house& h) const noexcept { return x < h.x ? true : (x > h.x ? false : y < h.y); }
};
house move_day3(house, dir);
std::pair<size_t, size_t> day3(line_view);
} // namespace aoc2015
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