let even n =
    for _ in 1..n do
        printf "1"

    printf "\n"

let odd n =
    printf "7"

    for _ in 2..n do
        printf "1"

    printf "\n"


let main =
    let input = stdin.ReadLine() |> int
    if input % 2 = 0 then even (input / 2) else odd (input / 2)