Classify Human Written vs. AI Written Code

/** AI-generated: polished, template-like */
public class GradeCalculator {
  /**
   * Computes an average and returns a letter grade.
   * @param scores Array of scores (0-100).
   * @return Grade string based on average.
   */
  public String grade(int[] scores) {
    if (scores == null || scores.length == 0) {
      return "N/A";
    }
    int total = 0;
    for (int s : scores) total += s;
    int avg = total / scores.length;
    return avg >= 90 ? "A" : avg >= 80 ? "B" : avg >= 70 ? "C" : "D";
  }
}

// human: quick fix for Friday grades
class GradeCalc{
  String grade(int[] scores){
    // no scores? idk, just "F"
    if(scores==null||scores.length==0) return "F";
    int sum=0;
    for(int s:scores) sum+=s; // TODO drop lowest?
    int avg=sum/scores.length;
    if(avg>= 90) return "A"; // ok
    if(avg>= 80) return "B";
    return "C"; // whatever
  }
}