#include <stdio.h>
#include <stdlib.h>

int main(void){
    // 大きい箱
    int bigbox = 0;
    scanf("%d", &bigbox);
    int len = 0;
    scanf("%d", &len);
    
    int val[len]; 
    for(int i = 0;i < len;i++){
    	scanf("%d",&val[i]);
    }
    
    int *p = val;
    
	for (int i = 0; i < len; i++)
	{
		for (int j = 0; j < len; j++)
		{
			//比較元より大きければ入れ替える
			if (p[i] < p[j])
			{
				int x = p[j];
				p[j] = p[i];
				p[i] = x;
			}
		}
	}
	int sum = 0;
	int count = 0;
	while(sum < bigbox && count < len){
    	sum += p[count];
    	count++;
    }
    if(sum <= bigbox){
    	printf("%d",count);	
    }else{
    	printf("%d",count - 1);
    }
    
    
}