#!usr/bin/env python

if __name__ == '__main__':
    L = input()
    N = input()
    W = map(int, raw_input().split())
    
    W = sorted(W)
    
    sum = 0
    for i in range(N):
        sum = sum + W[i]
        if sum > L:
            print i
            exit(0)

    print N
    exit(0)