Greedy sheriffs of the Wild West are hunting for rare diamonds and for that they went together to march through the underground maze. One sheriff finds diamonds only for himself, and the second hides the stones into their own pockets. What connects them - it's the same goal, the only bad - can not pass on the same road. Distribute the path sheriffs with such a condition that they do not face each other on the way. Oh, often cross the road and so they can not pass their own difficult path.