#include <stdio.h>

int main(void){
	int l = 0 , n = 0 ;
	scanf("%d\n%d\n",&l,&n);
	int block[n];
	for(int i = 0 ; i < n ; i++ ){
		scanf("%d",&block[i]);
	}
	
	for(int i = 0  ; i < n ; i++ ){
		for(int j = 0 ; j < n ; j++ ){
			if(block[i] > block[j]){
				int size = block[i];
				block[i] = block[j];
				block[j] = size;
			}
		}
	}
	int max = 0;
	for(int i = 0 ; i < n ; i++ ){
		max += block[i];
		if(max > l){
			printf("%d",i);
			break;
		}
	}
}