using System;
using System.Collections.Generic;
using System.Text;
public static class Program
{
private static void Main()
{
string a = Console.ReadLine();
string b = Console.ReadLine();
string c = Console.ReadLine();
try
{
int suma = int.Parse(a) + int.Parse(b) + int.Parse(c);
Console.WriteLine(suma);
}
catch (FormatException)
{
Console.WriteLine("format exception, exit");
}
catch (ArgumentException)
{
Console.WriteLine("argument exception, exit");
}
catch (OverflowException)
{
Console.WriteLine("overflow exception, exit");
}
catch (Exception)
{
Console.WriteLine("non supported exception, exit");
}
}
}
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