I don't know why my contest 857 div2 was unrated , the offical says my submissions is very similar with xiao_yang_0725's but I think my answer is completely different with xiao_yang_0725 in 1802B and 1802C.

here is xiao_yang_0725's submissions 196602733 196605523

and here is my submissions 196616353 196640788

I think for this test my grade should be rated