#include <stdio.h>
int main(void){
int i, j, tmp, L, N;
int W[10000] = {};
scanf("%d%d", &L, &N);

for( i = 0; i < N; i++){
scanf("%d",&W[i]);
}
for( i = 0; i < N - 1; ++i){
	for ( j = i + 1; j < N; ++j){
		if ( W[i] > W[j]){
			tmp = W[i];
			W[i] = W[j];
			W[j] = tmp;
	
		} 
	}
}
int goukei = 0, count = 0;
for ( i = 0; goukei < L; i++){
	goukei += W[i];
	count++;
}
if(goukei > L){
	count--;
}
printf ("%d",count);
return 0;
}