3 problems

  • 1
ID Problem Show tags Hide tags AC / Tried Difficulty
882 P882  错排问题 57 / 193 6
883 P883  括号化问题（卡特兰数应用） 17 / 70 7
884 P884  买票（卡特兰数应用） 2 / 28 9
  • 1

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