Doogi's Blog

public class Hello {
  public static void main(String[] args) {
    System.out.println("Hello World!");
  }
}

class Example
  def example(arg1)
    return "Hello: " + arg1.to_s
  end
end

// int[] nums = { 1, 2, 3, 4, 5 };
// 根据数组生成所有可能的子数组
// 此例为12345 1234 123 12 1 2345 234 23 2 345 34 3 45 4 5
static IList<ilist<int>> test3(int[] nums)
{
	IList<ilist<int>> result = new List<ilist<int>>();
 
	for (int i = 0; i < nums.Length; i++)
	{
		List<int> list = new List<int>(nums);
		for (int j = 0; j < i; j++)
		{
			list.RemoveAt(0);
		}
 
		for (int k = 0; k < list.Count; k++)
		{
			List<int> list2 = new List<int>(list);
			for (int l = 0; l < k; l++)
			{
				if (list2.Count > 0)
					list2.RemoveAt(list2.Count - 1);
			}
			result.Add(list2);
		}
	}
	return result;
}
// string mes = "{()[]}";
// 判断字符串内的各种括号是否符合规则
static bool test2(string mes)
{
	List<char> list = new List<char>();
	foreach (char c in mes)
	{
		if (c == '{' || c == '[' || c == '(')
		{
			list.Add(c);
		}
		else if (c == '}')
		{
			if (list.Last() != '{')
				return false;
			list.RemoveAt(list.Count - 1);
		}
		else if (c == ']')
		{
			if (list.Last() != '[')
				return false;
			list.RemoveAt(list.Count - 1);
		}
		else if (c == ')')
		{
			if (list.Last() != '(')
				return false;
			list.RemoveAt(list.Count - 1);
		}
	}
	return list.Count == 0;
}
 
// string[] mes = { "5", "-2", "4", "C", "D", "9", "+", "+" };
// 根据字符数据做运算 
static int test1(string[] mes)
{
	List<int> list = new List<int>();
	foreach (string s in mes)
	{
		Console.WriteLine(s);
		if (s == "C")
		{
			if (list.Count > 0)
				list.RemoveAt(list.Count - 1);
		}
		else if (s == "D")
		{
			if (list.Count > 0)
			{
				int a = list.Last();
				list.Add(a * 2);
			}
		}
		else if (s == "+")
		{
			if (list.Count > 1)
			{
				int a = list.Last();
				int b = list[list.Count - 2];
				list.Add(a + b);
			}
		}
		else
		{
			list.Add(int.Parse(s));
		}
	}
	return list.Sum();
}