#include <iostream>
#include <algorithm>
#include <vector>

int main(void){
	int16_t W, N;
	std::cin >> W;
	std::cin >> N;
	std::vector<int16_t> w;
	int16_t num = 0;
	for(int16_t i=0; i<N; i++){
		std::cin >> num;
		w.push_back(num);
	}
	std::sort(w.begin(),w.end());
	int16_t sum=0;
	int16_t i = 0;
	while(true){
		sum += w[i];
		if(sum > W){
			std::cout << i;
			break;
		}
		i++;
		if(i == N){
			std::cout << i << std::endl;
			break;
		}
	}
	return 0;
}