#include <stdio.h>

void bubble(int len, int *W){
	int i,j;
	for(i=0;i<len;i++){
		for(j=i+1;j<len;j++){
			if( W[i] > W[j] ){
				int tmp = W[i];
				W[i] = W[j];
				W[j] = tmp;
			}
		}
	}
}

int main(void){
	int i;
	int L, N;
	int W[10100];
	
	int sum = 0;
	int count = 0;
	scanf("%d", &L);
	scanf("%d", &N);
	
	for(i=0;i<N;i++){
		scanf("%d", &W[i]);
	}
	
	bubble(N, W);
	
	for(i=0;i<N;i++){
		if( (sum+W[i]) > L ){
			break;
		}else{
			count++;
			sum += W[i];
		}
	}
	
		printf("%d\n", count);
	return 0;
}