CF440C.One-Based Arithmetic
普及/提高-
通过率：0%
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题目描述
Prof. Vasechkin wants to represent positive integer n as a sum of addends, where each addends is an integer number containing only 1s. For example, he can represent 121 as 121=111+11+–1. Help him to find the least number of digits 1 in such sum.
输入格式
The first line of the input contains integer n ( 1<=n<10^{15} ).
输出格式
Print expected minimal number of digits 1.
输入输出样例
输入#1
121
输出#1
6