import torch.nn as nn

class LeNet(nn.Module):
    def __init__(self):
        super(LeNet, self).__init__()
        act = nn.Sigmoid
        self.body = nn.Sequential(
            nn.Conv2d(3, 12, kernel_size=5, padding=5 // 2, stride=2),
            act(),
            nn.Conv2d(12, 12, kernel_size=5, padding=5 // 2, stride=2),
            act(),
            nn.Conv2d(12, 12, kernel_size=5, padding=5 // 2, stride=1),
            act(),
            nn.Conv2d(12, 12, kernel_size=5, padding=5 // 2, stride=1),
            act(),
        )
        self.fc = nn.Sequential(nn.Linear(768, 10))

    def forward(self, x):
        out = self.body(x)
        out = out.view(out.size(0), -1)
        out = self.fc(out)
        return out