求逆序队的两种方法
方法一:用归并排序求逆序对
https://blog.csdn.net/qq_40938077/article/details/85331296
方法二:树状数组求逆序对
https://blog.csdn.net/qq_41621517/article/details/100557030
方法一:用归并排序求逆序对
https://blog.csdn.net/qq_40938077/article/details/85331296
方法二:树状数组求逆序对
https://blog.csdn.net/qq_41621517/article/details/100557030
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