(Idea of the problem A — ----------)

Code — 51241276

(Idea of the problem B — IbragiMMamilov)

Code — 51241302

(Idea of the problem C — usertab34)

Code — 51241318

(Idea of the problem D — Denisson)

Code — 51241330

(Idea of the problem E — Ralsei)

Code — 51241345