Solution: Robbers' Planned Journey Across the River
Let's recall that the boat can accommodate only two men at a time, or one man and a bag.
1. Sosthenes takes his bag across the river leaves it at other shore & comes back.
2. Sosthenes takes Hilari's bag to the other shore & leaves it there where his own bag is already there.
3. Now, Hilari takes Sosthenes to the other shore, leaves him there & come back after recollecting own bag.
4. Hilari drops own bag at near shore & takes Babylas to other shore & returns back.
5. Next, he takes Babylas's bag & drops it at other shore where Babylas is waiting for his bag. And Hilary returns once again.
6. Finally, he collects his own bag and takes it to other shore.
2. Sosthenes takes Hilari's bag to the other shore & leaves it there where his own bag is already there.
3. Now, Hilari takes Sosthenes to the other shore, leaves him there & come back after recollecting own bag.
4. Hilari drops own bag at near shore & takes Babylas to other shore & returns back.
5. Next, he takes Babylas's bag & drops it at other shore where Babylas is waiting for his bag. And Hilary returns once again.
6. Finally, he collects his own bag and takes it to other shore.
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