#!/usr/bin/env python
# -*- coding: utf-8 -*-


def PutBlock(L, N, Wi):
    count = 0

    Wi.sort()

    for i in range(N):
        if L >= Wi[i]:
            L -= Wi[i]
            count += 1
        else:
            break

    return count


def main():
    L = int(input())
    N = int(input())
    Wi = list(map(int, input().split()))

    print(PutBlock(L, N, Wi))


if __name__ == '__main__':
    main()