点击打开链接 Communication System Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 21007 Accepted: 7449 Description We have received an order from Pizoor Communications Inc. for a special communication system. The system consists of several d
Description Given any integer 0 <= n <= 10000 not divisible by 2 or 5, some multiple of n is a number which in decimal notation is a sequence of 1's. How many digits are in the smallest such a multiple of n? Input Each line contains a number n.