import copy


class Node:
    def __init__(self, key, value):
        self.key = key
        self.value = value
        self.next = None


class HashTable:
    def __init__(self):
        self.capacity = 2
        self.noOfElements = 0
        self.elementList = [None] * 2
    
    def hash(self, value):
        if isinstance(value, int):
            return value % self.capacity
        
        sum = 0
        for l in value:
            sum += ord(l)
        return sum % self.capacity

    def insert(self, key, value):
        if self.noOfElements and (self.capacity // self.noOfElements < 2):
            self.resizeAndRehash()
        hash_key = self.hash(key)
        element = self.elementList[hash_key]
        
        if element is None:
            self.elementList[hash_key] = Node(key, value)
            self.noOfElements += 1
            return
        
        while element.next is not None:
            element = element.next
        element.next = Node(key, value)
        self.noOfElements += 1
        
    def get(self, key):
        element = self.elementList[self.hash(key)]
        while element is not None:
            if element.key == key:
                return element.value
            element = element.next
        return None
    
    def getPosition(self, key):
        element = self.elementList[self.hash(key)]
        position = 0
        while element is not None:
            if element.key == key:
                return (key,position)
            element = element.next
            position += 1
        return None
    
    def resizeAndRehash(self):
        self.capacity *= 2
        
        copyElementList = copy.deepcopy(self.elementList)
        self.elementList = [None] * self.capacity
        self.noOfElements = 0
        for element in copyElementList:
            copyElement = copy.deepcopy(element)
            while copyElement is not None:
                self.insert(copyElement.key, copyElement.value)
                copyElement = copyElement.next
    
    def __str__(self):
        var = ""
        for element in self.elementList:
            while element is not None:
                var += f"{element.key} -> {element.value}\n"
                element = element.next
        return var