I'm doing a diet challenge with some friends.

Knowing the difficulty of dieting, I realized that it is difficult to do it alone, so I have been trying to diet with a few friends for several months, even giving them a penalty, and so far, I have achieved my goals. I could not resist the temptation of late-night snacks, so I have eaten late-night snacks several times. How do you resist the temptation of late-night snacks?