N = int(input())

#     0  1  2  3  4  5  6  7  8  9
#m =[ 6, 2, 5, 5, 4, 5, 6, 3, 7, 6]
#m =[-1, 2,-1,-1, 4, 5,-1, 3, 7, 6]

ans = ''
if N % 2 == 0:
    ans = '1' * (N//2)
else:
    ans = '7' + '1' * (N//2-1)
print(ans)