If you want to be thin, dieting is unnecessary, especially if you exercise.

Keep a normal diet, don't be greedy, eat less low-fat food, exercise for at least 2 hours every day, and increase the intake of water and vegetables. The key to losing weight is persistence, and 15 days cannot change significantly. If you can do it, it is inevitable to lose weight and keep fit. If you can't hold on, give up in a few days, or fish for three days and dry the net for two days, but you can't control your mouth and don't want to move, then there is no way.