import std;

void main () {
    auto A = readln.split.to!(int[]);
    auto T = readln.split.to!(int[]);

    int took = 0;
    foreach (i; 0 .. A.length) {
        took += T[i] * A[i];
    }

    if (took <= T[$ - 1]) {
        writeln("Yes");
    }
    else {
        writeln("No");
    }
}

void read (T...) (string S, ref T args) {
    import std.conv : to;
    import std.array : split;
    auto buf = S.split;
    foreach (i, ref arg; args) {
        arg = buf[i].to!(typeof(arg));
    }
}