import java.util.Arrays; import java.util.Scanner; public class NumberBlocks { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int L = sc.nextInt(); int N = sc.nextInt(); int W[] = new int[N]; for(int i = 0;i < N; i++){ W[i] = sc.nextInt(); } Arrays.sort(W); for(int i = 0;L > 0;){ L -= W[i]; i ++; if(L <= 0){ if(i < 0){ i --; } System.out.println(i); break; } } } }