#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair<ll,ll>pairll;
#define MOD 1000000007
#define fr first
#define sc second
#define pb push_back

ll k,l,r,t,x,y,f[1000007],p,a;

int main()
{
    cin>>k>>l>>r>>t>>x>>y;
    r-=l;
    k-=l;
    t-=(k/x);
    k%=x;
    p=y%x;
    a=y/x;

    while(t>0){
        f[k]=1;

        if(k+y>r || k+y<x){
            cout<<"No"<<endl;
            return 0;
        }else{
            t-=a;
            k+=p;
        }
        if(k>=x){
            t-=(k/x);
            k%=x;

            if(t<=0 || f[k]==1){
                cout<<"Yes"<<endl;
                return 0;
            }
        }
        if(t<=0 || f[k]==1){
            cout<<"Yes"<<endl;
            return 0;
        }

    }
    cout<<"Yes"<<endl;

    return 0;
}
