Introduction - If you have any usage issues, please Google them yourself
Nasty frog, and help farmers find damage largest frog. That is, to find a path through the rice paddies frog, treading on this path is less than the number of rice paddy frogs on any other path is stepped on. Of course, throughout the rice fields also may simply not exist frog path. The key question is: find all the frog path across the rice paddies