#include<cstdio>

#include<cstring>

#include<cctype>

#include<algorithm>

using namespace std;

#define rep(i,s,t) for(int i=s;i<=t;i++)

#define dwn(i,s,t) for(int i=s;i>=t;i--)

#define clr(x,c) memset(x,c,sizeof(x))

#define ll long long

int read(){

	int x=0;char c=getchar();

	while(!isdigit(c)) c=getchar();

	while(isdigit(c)) x=x*10+c-'0',c=getchar();

	return x;

}

char sh[15];

void print(int x){

	int cnt=0;

	while(x) sh[++cnt]=x%10,x/=10;

	dwn(i,cnt,1) putchar(sh[i]+48);

	putchar(32);

}

const int nmax=1e7+5;

bool a[nmax];

int main(){

	int n=read(),k=read(),T=read(),a0=read(),b=read(),c=read(),p=read();

	rep(i,1,n) if((a0=((ll)a0*b+c)%p)>=T) a[i]=1;

	int l=0,r=0,cnt=0;ll ans=0;

	while(1){

		if(a[l]) --cnt;++l;

		while(cnt<k&&r<=n) cnt+=a[r++];

		if(cnt==k) ans+=n-r+2;

		else break;

	}

	printf("%lld\n",ans);

	return 0;

}