import java.util.*; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int n = sc.nextInt(); int b = sc.nextInt(); int[] ls = new int[n]; for(int i=0;i<n;i++) ls[i] = sc.nextInt(); Arrays.sort(ls); int inf = 0; int sup = n-1; int cnt = 0; while(true){ cnt++; int x = ls[sup]; sup--; if(inf>sup) break; int y = ls[inf]; if(x+y<=b) inf++; if(inf>sup) break; } System.out.println(cnt); } }