program main
	implicit none
	integer i,j
	character*50001 a
	read(*,*)i
	if(mod(i,2)==0)then
		do j=1,i/2
			write(*,"(i0)",advance='no')1
		enddo
	else
		write(*,"(i0)",advance='no')7
		do j=2,i/2
			write(*,"(i0)",advance='no')1
		enddo
	endif
	write(*,*)
end program main