import std.algorithm;
import std.array;
import std.conv;
import std.math;
import std.stdio;
import std.string;
import std.range;

int readint() {
    return readln.chomp.to!int;
}

int[] readints() {
    return readln.split.map!(to!int).array;
}

string conv(int n) {
    if (n == 0)
        return "0";

    int[] xs;
    while (n > 0) {
        xs ~= (n % 7);
        n /= 7;
    }
    xs.reverse;
    return join(xs.map!(to!string));
}

void main() {
    int n = readint();
    writeln(conv(n));
}