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

void bubble_sort(int *data, int n){
    int i,x;
    bool flag = false;
 
    while(flag == false){
        flag = true;
        for(i=0; i<n-1; i++){
            if(data[i] > data[i+1]){
                x = data[i];
                data[i] = data[i+1];
                data[i+1] = x;
                flag = false;
            }
        }
    }
}

int main(void){

    int L,N,i,sum;
    int *Wi;

    scanf("%d",&L);
    scanf("%d",&N);

    Wi = (int*)malloc(N*sizeof(int));

    for(i=0; i<N; i++){
        scanf("%d",&Wi[i]);
    }

    bubble_sort(Wi,N);
    for(i=0,sum=0; i<N && sum<L; i++){
        sum += Wi[i];
    }

    if(i==N){
        printf("%d",i);
    } else {
        printf("%d",i-1);
    }

    free(Wi);
    return 0;
}