# -*- coding: utf-8 -*-

if __name__ == '__main__':
    N = int(input())
    q, m = divmod(N, 2)
    if m == 0:
        print(*[1 for _ in range(q)], sep='')
    else:
        q -= 1
        l = [7] + [1 for _ in range(q)]
        print(*l, sep='')