N = int(input())
result = []
if N <= 5:
    if N == 0 and N == 1:
        print(0)
    if N == 2:
        print(1)
    if N == 3:
        print(7)
    if N == 4:
        print(11)
    if N == 5:
        print(71)
else:
    result = [1]*(N//2)
    print("".join(map(str,result)))