package main

import (
	"bufio"
	"fmt"
	"io"
	"os"
)

func solve(in io.Reader, out, err io.Writer) {
	num := 0
	fmt.Fscan(in, &num)
	temp := num / 2

	if temp*2 == num {
		fmt.Fprint(out, 1)
	} else {
		fmt.Fprint(out, 7)
	}
	for i := 1; i < temp; i++ {
		fmt.Fprint(out, 1)
	}
	fmt.Fprintln(out, "")

}

func main() {
	br := bufio.NewReaderSize(os.Stdin, int(1e6))
	solve(br, os.Stdout, os.Stderr)
}