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D. Lonely Mountain Dungeons Once, the people, elves, dwarves, and other inhabitants of Middle-earth gathered to reclaim the treasures stolen from them 阅读全文
posted @ 2024-02-13 20:33
onlyblues
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E. Space Harbour There are $n$ points numbered $1$ to $n$ on a straight line. Initially, there are $m$ harbours. The $i$-th harbour is at point $X_i$ 阅读全文
posted @ 2024-02-13 12:59
onlyblues
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