📖Story
100 prisoners stand in a line. Each gets a hat: either RED 🔴 or BLUE 🔵.
Each prisoner can see all the hats in FRONT of them, but NOT their own hat or the hats behind them. Starting from the back, each prisoner must GUESS their own hat color out loud. Everyone hears the guesses. If wrong, they die. They plan a strategy beforehand. Can they guarantee saving most prisoners?