function getNameWeight(name) {
  return name.length + name.split("").reduce(function(res, char) {
    return res + char.toUpperCase().charCodeAt() - "A".charCodeAt() + 1;
  }, 0);
}

function rank(st, we, n) {
    if (!st) {
      return "No participants";
    }

    var results = [];
    st.split(",").forEach(function(name, index) {
      results.push({"name": name, "weight": getNameWeight(name)*we[index]});
    });
    if (n > results.length) {
      return "Not enough participants";
    };
    results.sort(function(a, b) {
      return (b.weight - a.weight) || a.name.localeCompare(b.name);
    });
    return results[n-1].name;
}