#include <bits/stdc++.h>

#define int long long
#define fi first
#define se second

using namespace std;

//const int MAXN = 100005;
//const int MOD = 1e9 + 7;

signed main() {
    cin.tie(0);
    cout.tie(0);
    ios_base :: sync_with_stdio(0);
    int k, l, r, t, x, y;
    cin >> k >> l >> r >> t >> x >> y;
    r -= l;
    k -= l;
    if (x + y <= r) {
        if (x > y && r / (x - y) < t) {
            cout << "No\n";
        } else {
            cout << "Yes\n";
        }
        return 0;
    }
    int cnt = 0;
    bool f = false;
    if (k + y <= r) {
        k += y;
    }
    for (int i = 0; i < x; i++) {
        if (k < x) {
            f = true;
            break;
        }
        cnt += k / x;
        k %= x;
        if (k + y > r) {
            f = true;
            break;
        }
        k += y;
    }
    if (!f || (f && cnt >= t)) {
        cout << "Yes\n";
    } else {
        cout << "No\n";
    }
    return 0;
}
