function Main(input) {
    input = input.trim().split("\n");
    let [n, k] = input[0].trim().split(" ").map(Number);
    let x = input[1].trim().split(" ").map(Number);
    x.sort((a, b) => a - b);
    let cnt = 0;
    let p = x[0];
    for (let i = 0; i < n; ++i) {
        if ((x[i] - p) >= k) {
            cnt++;
            p = x[i];
        }
    }
    console.log(cnt+1);
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));