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

void run(void){
  int t,n;
  scanf("%d%d",&t,&n);
  int *a=(int *)calloc(n,sizeof(int));
  int i;
  for(i=0;i<n;i++) scanf("%d",a+i);
  int *dp=(int *)calloc(1<<n,sizeof(int));
  for(i=1;i<(1<<n);i++){
    int sum=0;
    int j;
    for(j=0;j<n;j++) if((i>>j)&1) sum+=a[j];
    if(sum<=t){
      dp[i]=1;
      continue;
    }
    int min=n;
    for(j=i&(i-1);j>0;j=(j-1)&i){
      int m=dp[j]+dp[i^j];
      if(min>m) min=m;
    }
    dp[i]=min;
  }
  printf("%d\n",dp[(1<<n)-1]);
}

int main(void){
  run();
  return 0;
}