A river is surrounding the town, it’s convenient for those who need water, but not very much for folks who need to go outside, there are massive things need to worry when they need to cross the river. Many influencing factors, like the raft, the relationship between each other, their weights, time, the kids, and many other things, now your job is to consider carefully about all the conditions and make a perfect solution for our people. You can always get a little help by hint when you have no idea of how to solve it, but I believe you can make it, finally. Have fun!