question about weight lose

Shall I lose weight, nearly 1 kilo, if I cut down my calories intake by 1250 calories. I mean what if i eat 1250 calories for 2 days?

As a teen you need to eat more than 1250 calories a day, and you won't lose a kilo in 2 days.

What if I eat this amount of calories for 1 week?

I do know that teens should consume 1800 calories at least, but I used you eat this amount and gained the weight! Gosh...I'm so tangled. I am so active. I'm training for 2 hours per day and take not so short walks everyday! That means that I'm moderate and after 1 year dieting at last I've started to eat as a normal person, but I've gained! People say that this may be a water weight, but I can see some changes on my body. My cheeks got little bit bigger and belly as well.The rest of my training contains leg muscle exercises maybe that's the reason why in the legs area are no changes.

What should I do, what's you opinion??

you beat me to it! Sorry. Try looking at the cals you eat and then swapping the kinds of food for a more healthy option.