using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication1
{
 class Program
 {
  static void Main(string[] args)
  {
   Console.WriteLine("輸入你的總共課程數：");
   int score_number = 0;
   string score_temp = Console.ReadLine();
   score_number = Convert.ToInt32(score_temp);
   double[] score;
   score = new double[score_number];
   double[] unit;
   unit = new double[score_number];
   double sum = 0;
   double total_credit=0;
   Console.WriteLine("請輸入你的各個分數：");
   for (int i = 0; i <= score_number-1;i++ )
   {
    string temp=Console.ReadLine();
    score[i] = Convert.ToDouble(temp);
   }
   Console.WriteLine("請輸入你的各個權重：");
   for (int i = 0; i <= score_number-1;i++ )
   {
    string temp = Console.ReadLine();
    unit[i] = Convert.ToDouble(temp);
   }
   for (int i = 0;i <= score_number-1;i++)
   {
    sum =sum+(score[i] * unit[i]);
   }
   for (int i = 0; i <= score_number-1;i++ )
   {
    total_credit = total_credit + unit[i];
   }
   double result = 0;
   result = sum / total_credit;
   Console.WriteLine("您的加權評均分為：");
   Console.WriteLine(result);
   Console.ReadKey();
  }
 }
}