class Answer {
	constructor(input) {
		const data = input.split('\n');
		this.L = Number(data[0]);
		this.N = Number(data[1]);
		this.W = data[2].split(' ').map(Number);
    this.sum = 0;
    this.block = 0;
	}

	main() {
		const arr = this.W.sort((a, b)=>{return a-b;});
		for(let i=0;this.N>i; i++) {
      this.sum += arr[i];
      if(this.sum <= this.L) this.block++;
      if(this.sum >= this.L) {
        this.dest(this.block);
        break;
      }
		}
	}

	dest(ans) {
		console.log(ans);
	}
}
new Answer(require("fs").readFileSync("/dev/stdin", "utf8")).main();