I'd say for about 95% of it yes. Other fields can be useful, Graph Theory for instance when you are analyzing graphs i.e networks and stuff, and complexity theo

I'd say for about 95% of it yes. Other fields can be useful, Graph Theory for instance when you are analyzing graphs i.e networks and stuff, and complexity theory when you are analyzing and comparing different algorithm implementations. But those 5 above are the ones you just keep seeing/using over and over and over.