public class MyStack
    {
        private Stack<int> MinStack = new Stack<int>();
        private List<int> Stack = new List<int>();

        public int Count { get { return Stack.Count; } }

        public void Push(int value)
        {
            Stack.Add(value);
            if (MinStack.Count == 0 || value <= MinStack.Peek())
                MinStack.Push(value);
        }

        public int Pop()
        {
            var result = Stack[Stack.Count-1];
            Stack.RemoveAt(Stack.Count - 1);
            if (result==MinStack.Peek())
                MinStack.Pop();
            return result;

        }

        public int Min()
        {
            return MinStack.Peek();
        }
    }