module Main;

import CPLib.Bits::bit_set;
import CPLib.IO;

main : IO () = (
    let n = *read_i;
    let dp = fill(1.shift_left(6), fill(n+1, 0.0));
    let dp = dp[0][0].iset(1.0);
    let dp = range(0, n).fold(dp, |n, dp|
        range(0, 1.shift_left(6)).fold(dp, |flag, dp|
            let v = dp.@(flag).@(n);
            range(0, 6).fold(dp, |dice, dp|
                let flag = flag.bit_set(dice);
                dp[flag][n+1].imod(add(v / 6.0))
            )
        )
    );
    dp.@(1.shift_left(6) - 1).@(n).to_string.println;;
    pure()
);