• 2022-06-07
    [tex=1.143x1.0]AU/fsZjpolnbvVSulELhhA==[/tex]级全排列[tex=11.714x1.357]zA4Pce5PiTPU6q/BuH1SJX/F/x8XMpNhyWUQisk4Y5uduw8YZCQZp4GamE/+a9WY[/tex]的逆序数是[input=type:blank,size:6][/input].
  • 举一反三