public class AVLNode
{
    public int Key;
    public AVLNode Left, Right;
    public int Height;

    public AVLNode(int key)
    {
        Key = key;
        Height = 1;
    }
}

public class AVLTree
{
    private AVLNode root;

    int Height(AVLNode node) => node?.Height ?? 0;

    int BalanceFactor(AVLNode node) => Height(node.Left) - Height(node.Right);

    AVLNode RightRotate(AVLNode y)
    {
        var x = y.Left;
        var T2 = x.Right;

        x.Right = y;
        y.Left = T2;

        y.Height = Math.Max(Height(y.Left), Height(y.Right)) + 1;
        x.Height = Math.Max(Height(x.Left), Height(x.Right)) + 1;

        return x;
    }

    AVLNode LeftRotate(AVLNode x)
    {
        var y = x.Right;
        var T2 = y.Left;

        y.Left = x;
        x.Right = T2;

        x.Height = Math.Max(Height(x.Left), Height(x.Right)) + 1;
        y.Height = Math.Max(Height(y.Left), Height(y.Right)) + 1;

        return y;
    }

    public AVLNode Insert(AVLNode node, int key)
    {
        if (node == null)
            return new AVLNode(key);

        if (key < node.Key)
            node.Left = Insert(node.Left, key);
        else if (key > node.Key)
            node.Right = Insert(node.Right, key);
        else
            return node;

        node.Height = 1 + Math.Max(Height(node.Left), Height(node.Right));

        int balance = BalanceFactor(node);

        if (balance > 1 && key < node.Left.Key)
            return RightRotate(node);

        if (balance < -1 && key > node.Right.Key)
            return LeftRotate(node);

        if (balance > 1 && key > node.Left.Key)
        {
            node.Left = LeftRotate(node.Left);
            return RightRotate(node);
        }

        if (balance < -1 && key < node.Right.Key)
        {
            node.Right = RightRotate(node.Right);
            return LeftRotate(node);
        }

        return node;
    }
}

import hashlib
import json

class Block:
    def __init__(self, index, transactions, previous_hash):
        self.index = index
        self.transactions = transactions
        self.previous_hash = previous_hash
        self.nonce = 0
        self.hash = self.calculate_hash()

    def calculate_hash(self):
        block_string = json.dumps({
            'index': self.index,
            'transactions': self.transactions,
            'previous_hash': self.previous_hash,
            'nonce': self.nonce
        }, sort_keys=True).encode()
        return hashlib.sha256(block_string).hexdigest()

# Пример использования
block = Block(1, ['tx1', 'tx2'], '0000abc123')
print(block.hash)

from web3 import Web3

# Подключение к локальному Ethereum ноду
w3 = Web3(Web3.HTTPProvider('http://127.0.0.1:8545'))

# ABI и байткод контракта (упрощённый пример)
abi = '[{"inputs":[],"name":"getValue","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]'
bytecode = '0x6080604052348015600f57600080fd5b5060a88061001e6000396000f3fe60806040...'

# Развёртывание контракта
SimpleContract = w3.eth.contract(abi=abi, bytecode=bytecode)
tx_hash = SimpleContract.constructor().transact({'from': w3.eth.accounts[0]})
tx_receipt = w3.eth.wait_for_transaction_receipt(tx_hash)

print(f'Контракт развернут по адресу: {tx_receipt.contractAddress}')