#include <map>
#include <set>
#include <ctime>
#include <cmath>
#include <queue>
#include <stack>
#include <vector>
#include <string>
#include <cstring>
#include <cstdio>
#include <cstdlib>
#include <iostream>
#include <algorithm>
#include <functional>
#define spause() system("pause")

using namespace std;
typedef long long llong;
typedef unsigned long long ullong;
typedef pair<int, int> prdd;
typedef map<int, int> mpdd;

const int dinf = 0x7fffffff;
const llong llinf = 0x7fffffffffffffff;
const int p = 998244353;
llong starttime;

llong x, a, y, b, l, dv, dx, ans, tp;

llong gcd(llong a, llong b) { return b ? gcd(b, a % b) : a; }

llong exgcd(llong a, llong b, llong &x, llong &y) {
    if (!b) {
        x = 1;
        y = 0;
        return a;
    }
    llong d = exgcd(b, a % b, y, x);
    y = y - a / b * x;
    return d;
}

int main() {
    scanf("%lld%lld%lld%lld%lld", &x, &a, &y, &b, &l);
    dv = a - b;
    dx = y - x;
    if (dv < 0) {
        dv = -dv;
        dx = -dx;
    }
    llong gcds = exgcd(dv, l, ans, tp);
    if ((dx % gcds + gcds) % gcds != 0)
        goto badend;

    ans = dx / gcds * ans;
    ans = (ans % (l / gcds) + l / gcds) % (l / gcds);
    printf("%lld", ans);

    // cout << "\nDebug Info: " << clock() - starttime << " ms passed!\n";

    spause();
    return 0;

badend:
    printf("-1");
    return 0;
}