module Main;

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

main : IO () = (
    let n = *read_i;
    let c64 = 1.shift_left(6);
    let cur = fill(c64, 0.0).set(0, 1.0);
    let nxt = fill(c64, 0.0);
    let (cur, _) = range(0, n).fold((cur, nxt), |_, (cur, nxt)|
        let nxt = range(0, c64).fold(nxt, |i, nxt| nxt.set(i, 0.0));
        let nxt = range(0, c64).fold(nxt, |flag, nxt|
            let v = cur.@(flag);
            range(0, 6).fold(nxt, |dice, nxt| nxt.mod(flag.bit_set(dice), add(v / 6.0)))
        );
        (nxt, cur)
    );
    cur.@(c64 - 1).to_string.println;;
    pure()
);