// Try Codeforces
// author: Leonardone @ NEETSDKASU
import std.stdio      : readln, writeln;
import std.array      : split;
import std.string     : chomp;
import std.conv       : to;

auto gets() { return readln.chomp; }
auto getVals(T)() { return gets.split.to!(T[]); }

void main() {
    auto xs = getVals!long;
    auto l = xs[0], r = xs[1], x = xs[2], y = xs[3], k = xs[4];
    for (auto i = x; i <= y; i++) {
        auto v = i * k;
        if (l <= v && v <= r) {
            writeln("YES");
            return;
        }
    }
    writeln("NO");
}