Solutions for NOIP 2003 Problems: Neural Networks, Deduction Game, Optimal Binary Tree, and Infection Control
T1 Neural Network Propagation A neural network is modeled as a directed graph where nodes represent neurons. Each neuron may have multiple input chennels (Xi) and output channels (Yi). State C_i of a neuron depends on incoming signals and its threshold U_i. For non-input layers, initial C_i is zero....