In Codeforces Round #604 (Div. 2) I was able to solve A,B and C problems and I received 1314 rating.

I have given total 3 contest on codeforces.

• contest 1 — solved only A, rating — 1370 , rank — 5680
• contest 2 — unable to solve any problem, rating — 1255 , rank — 4168
• contest 3 — solved A,B and C, rating — 1314, rank — 2165

Despite solving more problems and getting better rank in contest 3 than in contest 1, why my ratings are less than that of contest 1 ? __