import core.bitop, std.algorithm, std.ascii, std.bigint, std.conv, std.math,
    std.functional, std.numeric, std.range, std.stdio, std.string, std.random,
    std.typecons, std.container, std.format;

// dfmt off
T lread(T = long)(){return readln.chomp.to!T();}
T[] lreads(T = long)(long n){return generate(()=>readln.chomp.to!T()).take(n).array();}
T[] aryread(T = long)(){return readln.split.to!(T[])();}
void scan(TList...)(ref TList Args){auto line = readln.split();
foreach (i, T; TList){T val = line[i].to!(T);Args[i] = val;}}
alias sread = () => readln.chomp();enum MOD = 10 ^^ 9 + 7;
alias PQueue(T, alias less = "a<b") = BinaryHeap!(Array!T, less);
// dfmt on

void main()
{
    auto S = sread();
    long ans;
    foreach (stat; 0 .. (1 << (S.length - 1)))
    {
        long score;
        long tmp = S[0] - '0';
        foreach (i; 1 .. S.length)
        {
            // writeln(tmp, " ", i, " ", stat & (1 << (i - 1)));
            if (stat & (1 << (i - 1)))
            {
                // writeln(tmp);
                score += tmp;
                tmp = S[i] - '0';
                continue;
            }
            tmp = tmp * 10 + (S[i] - '0');
        }
        score += tmp;
        // writefln("%05b %s", stat, score);
        ans += score;
    }
    writeln(ans);
}
