function Main(input) {
    input = input.split("\n");
    const l = parseInt(input[0]);
    const w = input[2].split(" ").map(s=>parseInt(s));
    w.sort((x,y)=>x-y);
    let res = 0;
    let cnt = 0;
    for (let x of w) {
        res += x;
        if (res > l) break;
        cnt++;
    }
    console.log(cnt);
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));