void main() {
	auto S = rs;
	ulong res;
	foreach(i; 0..2^^(S.length-1)) {
		auto flags = ("%." ~ (S.length-1).to!string ~ 'b').format(i);
		string formula;
		foreach(index, v; flags) {
			formula ~= S[index];
			if(v=='1') {
				formula ~= ' ';
			}
		}
		formula ~= S[$-1];
		res += formula.split.to!(ulong[]).sum;
	}
	res.writeln;
}

// ===================================

import std.experimental.all;

T readAs(T)() if (isBasicType!T) {
	return readln.chomp.to!T;
}
T readAs(T)() if (isArray!T) {
	return readln.split.to!T;
}

T[][] readMatrix(T)(uint height, uint width) if (!isSomeChar!T) {
	auto res = new T[][](height, width);
	foreach(i; 0..height) {
		res[i] = readAs!(T[]);
	}
	return res;
}

T[][] readMatrix(T)(uint height, uint width) if (isSomeChar!T) {
	auto res = new T[][](height, width);
	foreach(i; 0..height) {
		auto s = rs;
		foreach(j; 0..width) res[i][j] = s[j].to!T;
	}
	return res;
}

int ri() {
	return readAs!int;
}

double rd() {
	return readAs!double;
}

string rs() {
	return readln.chomp;
}