题号：NC200221
时间限制：C/C++/Rust/Pascal 2秒，其他语言4秒
空间限制：C/C++/Rust/Pascal 256 M，其他语言512 M
64bit IO Format: %lld
时间限制：C/C++/Rust/Pascal 2秒，其他语言4秒
空间限制：C/C++/Rust/Pascal 256 M，其他语言512 M
64bit IO Format: %lld
题目描述
牛牛给你一个只包含字符1到9的字符串S, 你现在可以在任意两个数字字符之间插入'+'号构成一个式子，现在希望你能求出所有式子的结果之和。
NiuNiu gives you a string contains only digit characters ‘1’ to ‘9’, and tell you that you can insert a ‘+’ for any number of times between any two characters to form a formula. Now he wants to know the sum of the results of all the different formulas that can be formed.
输入描述:
输入只包含一个数字字符的字符串The input is a string S only contains digit characters ‘1’ to ‘9’.
输出描述:
输出总和
Print the sum.
示例1