並べ替えアルゴリズムを最適化する方法: DRL の使用

import random
import numpy as np
import torch
import torch.nn as nn
import torch.optim as optim

class BubbleSortAgent(nn.Module):
def init(self, input_size, hidden_size, output_size):
super(BubbleSortAgent, self).init()
self.fc1 = nn.Linear(input_size, hidden_size)
self.relu = nn.ReLU()
self.fc2 = nn.Linear(hidden_size, output_size)

def forward(self, x):
    x = self.fc1(x)
    x = self.relu(x)
    x = self.fc2(x)
    return x

def train(agent, optimizer, criterion, num_episodes, episode_len):
for episode in range(num_episodes):
state = torch.tensor([random.random() for _ in range(episode_len)])
for i in range(episode_len):
action_scores = agent(state)
action = torch.argmax(action_scores)
next_state = state.clone()
next_state[i] = state[action]
next_state[action] = state[i]
reward = -(next_state - torch.sort(next_state)[0]).abs().sum()
loss = criterion(action_scores[action], reward)
optimizer.zero_grad()
loss.backward()
optimizer.step()
state = next_state

if name == 'main':
input_size = 10
hidden_size = 32
output_size = 10
agent = BubbleSortAgent(input_size, hidden_size, output_size)
optimizer = optim.SGD(agent.parameters(), lr=1e-3)
criterion = nn.MSELoss()
num_episodes = 1000
episode_len = 10
train(agent, optimizer, criterion,num_episodes, episode_len)