Bosses and mini bosses close every set
Each Codeforces band, LeetCode chapter and CSES or AtCoder collection ends with a boss problem, and mini bosses sit partway through.
What changed
The last problem of a set is its boss, shown in its own row with its own character. Mini bosses carry amber crossed swords: two in each Codeforces band, closing its first and second thirds, one in each LeetCode chapter, and one in each CSES or AtCoder collection of 15 problems or more.
Codeforces band pages use shades of blue, keep the official rating colours on each problem, and show the band’s boss as a figure above the set header.
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