Q1.yacq.cs

// :Program.:Impl
internal static void <Main>:Impl()
{
	File.ReadLines("a.log").ForEach(delegate(string $0)
	{
		Console.WriteLine($0);
	});
}

Q10.yacq.cs

// :Program.:Impl
internal static void <Main>:Impl()
{
	(
		from $0 in (
			from $0 in File.ReadLines("a.log")
			select int.Parse($0.Split(new char[]
			{
				(char)44
			})[2])).Distinct<int>()
		where $0 >= 10
		orderby $0
		select $0).ForEach(delegate(int $0)
	{
		Console.WriteLine($0);
	});
}

Q2.yacq.cs

// :Program.:Impl
internal static void <Main>:Impl()
{
	File.ReadLines("a.log").Select(delegate(string $0)
	{
		string[] array = $0.Split(new char[]
		{
			(char)44
		});
		return string.Concat(new string[]
		{
			array[0],
			",",
			array[3]
		});
	}).ForEach(delegate(string $0)
	{
		Console.WriteLine($0);
	});
}

Q3.yacq.cs

// :Program.:Impl
internal static void <Main>:Impl()
{
	File.ReadLines("a.log").Where(delegate(string $0)
	{
		string a = $0.Split(new char[]
		{
			(char)44
		})[0];
		return a == "server4";
	}).ForEach(delegate(string $0)
	{
		Console.WriteLine($0);
	});
}

Q4.yacq.cs

// :Program.:Impl
internal static void <Main>:Impl()
{
	Console.WriteLine(File.ReadLines("a.log").Count<string>());
}

Q5.yacq.cs

// :Program.:Impl
internal static void <Main>:Impl()
{
	(
		from $0 in (
			from $0 in File.ReadLines("a.log")
			select $0.Split(new char[]
			{
				(char)44
			}) into $0
			orderby $0[0], int.Parse($0[2])
			select $0).Take(5)
		select string.Join(",", $0)).ForEach(delegate(string $0)
	{
		Console.WriteLine($0);
	});
}

Q6.yacq.cs

// :Program.:Impl
internal static void <Main>:Impl()
{
	Console.WriteLine(File.ReadLines("a.log").Distinct<string>().Count<string>());
}

Q7.yacq.cs

// :Program.:Impl
internal static void <Main>:Impl()
{
	Console.WriteLine(File.ReadLines("a.log").Distinct((string $0) => $0.Split(new char[]
	{
		(char)44
	})[2]).Count<string>());
}

Q8.yacq.cs

// :Program.:Impl
internal static void <Main>:Impl()
{
	IGrouping<string, string> source = (
		from $0 in File.ReadLines("a.log")
		select $0.Split(new char[]
		{
			(char)44
		})[3] into $0
		group $0 by $0 into $0
		orderby $0.Count<string>() descending
		select $0).First<IGrouping<string, string>>();
	string value = string.Concat(new object[]
	{
		source.Count<string>(),
		" ",
		source.First<string>()
	});
	Console.WriteLine(value);
}

Q9.yacq.cs

// :Program.:Impl
internal static void <Main>:Impl()
{
	(
		from $0 in File.ReadLines("a.log").Select(delegate(string $0)
		{
			string text = $0.Split(new char[]
			{
				(char)44
			})[0];
			return text.Replace("server", "xxx");
		})
		group $0 by $0 into $0
		select string.Concat(new object[]
		{
			$0.Count<string>(),
			" ",
			$0.First<string>()
		})).ForEach(delegate(string $0)
	{
		Console.WriteLine($0);
	});
}