Dreamoon Likes Sequences
Dreamoon likes sequences very much. So he created a problem about the sequence that you can’t find in OEIS: You are given two integers $d, […]
Dreamoon
Dreamoon Likes Coloring
Dreamoon likes coloring cells very much. There is a row of $n$ cells. Initially, all cells are empty (don’t contain any color). Cells are numbered […]
Dreamoon Likes Strings
Dreamoon likes strings. Today he created a game about strings: String $s_1, s_2, \ldots, s_n$ is beautiful if and only if for each $1 \le i < […]
