程序代码：

#include<stdio.h>
int main()
{
    int locate1,locate2,num,v1,v2;
    scanf("%d%d%d%d%d",&locate1,&locate2,&v1,&v2,&num);
    int n=0;
    if(locate1!=locate2)
    {
    do
    {
        locate1=(locate1+v1)%num;
        locate2=(locate2+v2)%num;
        n++;
    }while(locate1!=locate2);
    }
    printf("%d",n);
}