1750.
Euler theorem
时间限制 1000 ms
内存限制 512 MB
HazelFan is given two positive integers $a,b$, and he wants to calculate $a\mod b$. But now he forgets the value of $b$ and only remember the value of $a$, please tell him the number of different possible results.
输入数据
输出数据
For each test case:
A single line contains a nonnegative integer, denoting the answer.