//
let L, N, W;

//
process.stdin.resume();
process.stdin.setEncoding('utf8');

process.stdin.on('data', data => {
  const arr = data.split('\n');
  L = Number(arr[0]);
  N = Number(arr[1]);
  W = arr[2].split(' ').map(x => Number(x)).sort();
});

process.stdin.on('end', () => {

  let count = 0, sum = 0;

  while (L - sum <= W[count]) {
    sum += W[count];
    count++;
  }

  console.log(count);
});