#include <bits/stdc++.h>

[[nodiscard]] static inline constexpr std::string solve(const uint_fast32_t N) noexcept
{
	std::string ans(N / 2, '1');
	if (N & 1) ans[0] = '7';
	return ans;
}

int main()
{
	std::cin.tie(nullptr);
	std::ios::sync_with_stdio(false);
	
	uint_fast32_t N;
	std::cin >> N;

	std::cout << solve(N) << '\n';
	return 0;
}