שאלה במדעי המחשב

Console.WriteLine("enter the number on your ticket");
int num= int.Parse(Console.ReadLine());
int TwoDigit = num % 10;
int num2 = 0;
if (num > 200 && num < 800)
num2 = num2 + 300;
if (num % 3 == 0 || num % 2 == 1)
num2 = num2 + 500;
if (TwoDigit * 10 == 10)
{
num2 =num2+ 1000;
Console.WriteLine("you won {0} money",num);
}
בנו תוכנית


הגעתי לכאן:
Console.WriteLine("enter a 3 digits num and maybe you will win something! ");
int prize = int.Parse(Console.ReadLine());
int num1 = 0;
if (prize > 200 && prize < 800)
{
num1 = num1 + 300;
}
else
{
if (prize % 3 == 0 && prize % 2 == 1)
num1 = num1 + 500;
if (prize % 100 == 10)
num1 = num1 + 1000;

}



ונתקעתי