import torch

class LinearClassifier(torch.nn.Module):
    def __init__(self, input_dim):
        super(LinearClassifier, self).__init__()
        self.linear = torch.nn.Linear(input_dim, 1)
        self.sigmoid = torch.nn.Sigmoid()

    def forward(self, x):
        x = self.linear(x)
        x = self.sigmoid(x)
        return x