#include<stdio.h>

int main(void)
{
    int L;
    int N;
    int W[10000];
    int i, j, tmp;
    int number=0, cnt=0;
    
    scanf("%d", &L);
    scanf("%d", &N);
    
    for (i=0; i<N; i++){
       scanf("%d", &W[i]); 
    }
    
    for (i=0; i<N; i++){
        for (j=i+1; j<N; j++){
            if (W[i] > W[j]) {
                tmp =  W[i];
                W[i] = W[j];
                W[j] = tmp;
            }
        }
    }
    for (i=0; i<N; i++){
        number = number + W[i];
        if (L<number){
            break;
        }
        cnt = cnt+1;
    }
    printf("%d",cnt);
    
}