Depending on the ratio of weight between the different shapes, technically any of the stickmen has a chance to die.
While commonly the accepted answer would be that A and E live, and the others die, given this is a well-known question someone decided to go for the full answer:
Youtube video explaining the different weight ratio scenario's and their impact
While usually I'd follow the general policy here not to provide link-only answers, in here it'd seem a better fit to point to a full answer with explanation then to just type out someone elses work and take credit for it.