#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
int main() {
	double BoxWidth;
	int NumberOfBlocks;
	vector<double> BlockWidths;
	cin >> BoxWidth >> NumberOfBlocks;
	for (auto i = 0; i != NumberOfBlocks; ++i) {
		double w;
		cin >> w;
		BlockWidths.push_back(w);
	}
	sort(BlockWidths.begin(), BlockWidths.end());
	double BockWidthAmount(0);
	int i(0);
	for (; i != NumberOfBlocks; ++i) {
		BockWidthAmount += BlockWidths.at(i);
		if (BockWidthAmount > BoxWidth) break;
	}
	cout << i << endl;
	return 0;
}