A11483. Congruence Equation
编程题
普及/提高-
知识点
题目描述
Given an integer $x$ . Your task is to find out how many positive integers $n$ ( $1<=n<=x$ ) satisfy
 where $a,b,p$ are all known constants.
 where $a,b,p$ are all known constants.
输入格式
The only line contains four integers $a,b,p,x$ ( $2<=p<=10^{6}+3$ , $1<=a,b<p$ , $1<=x<=10^{12}$ ). It is guaranteed that $p$ is a prime.
输出格式
Print a single integer: the number of possible answers $n$ .
输入输出样例
输入 #1
2 3 5 8
输出 #1
2
输入 #2
4 6 7 13
输出 #2
1
输入 #3
233 233 10007 1
输出 #3
1
说明/提示
In the first sample, we can see that $n=2$ and $n=8$ are possible answers.