1. A semiconductor integrated circuit, comprising: a first resistive-change element including one end having a first polarity connected to a first power source, the first resistive-change element including another end having a second polarity connected to an output node; a second resistive-change element including one end having the second polarity connected to the output node and another end; and a first switching element including a first terminal connected to another end of the second resistive-change element, the first switching element including a second terminal connected to a second power source.