a=int(input())
on=a//2
lsout=[]
for  i in range(on):
    if a%2!=0 and i==on-1:
        lsout.append(7)
    else:
        lsout.append(1)
lsout.reverse()
for i in range(len(lsout)):
    print(int(lsout[i]),end="")