#include <stdio.h>

int main(void)
{

int BoxW,N,BlockW[10000],i;

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

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

int j,temp;

for(i=0;i<N;i++){
	for(j=i+1;j<N;j++){
		if( BlockW[i] > BlockW[j] ){
		temp= BlockW[i];
		BlockW[i]=BlockW[j];
		BlockW[j]=temp;
		}
	}
}

int total=0;
int count=0;

for(i=0;i<N;i++){
	total = total + BlockW[i];
	if(total <= BoxW){
		count++;
	}else{
		break;
	}
}

printf("%d\n",count);

return 0;
}