You're going to cheat on your diet. It's inevitable. There will be times you slip up a little, then others when you more or less black out and gorge on a package of Oreos your roommate left behind, then eat your way through his leftover pad thai.
Once the guilt and your bloat settle, get to work. This bodyweight workout will do the trick. Watch the video for visual demonstration.
Perform each exercise for 30 seconds with minimal rests between. Recover 45 seconds between sets. Repeat 3 times.