string num1 = Console.ReadLine();
string num2 = Console.ReadLine();
string num3 = Console.ReadLine();
int num11 = Convert.ToInt32(num1);
int num22 = Convert.ToInt32(num2);
int num33 = Convert.ToInt32(num3);
int result = num11 + num22 + num33;
Console.WriteLine(Convert.ToString(result));
Console.ReadKey();


string sub1 = Console.ReadLine();
string sub2 = Console.ReadLine();
int sub11 = Convert.ToInt32(sub1);
int sub22 = Convert.ToInt32(sub2);
int result_add = sub11 + sub22;
int result_subtract = sub11 - sub22;
int result_multy = sub11 * sub22;
int result_divide = sub11 / sub22;
Console.WriteLine(Convert.ToString(result_add));
Console.WriteLine(Convert.ToString(result_subtract));
Console.WriteLine(Convert.ToString(result_multy));
Console.WriteLine(Convert.ToString(result_divide));
Console.ReadKey();


string score1 = Console.ReadLine();
string score2 = Console.ReadLine();
string score3 = Console.ReadLine();
string score4 = Console.ReadLine();
string score5 = Console.ReadLine();
double score11 = Convert.ToDouble(score1);
double score22 = Convert.ToDouble(score2);
double score33 = Convert.ToDouble(score3);
double score44 = Convert.ToDouble(score4);
double score55 = Convert.ToDouble(score5);
double z = score11 + score22 + score33 + score44 + score55;
double y = z / 500;
double x = y * 100;
Console.WriteLine(Convert.ToString(x));