Minimum Inversion Number

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HDU 1394 Minimum Inversion Number ( 树状数组求逆序数 )

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1394 Minimum Inversion Number Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 10…

HDU 1394 Minimum Inversion Number(最小逆序数线段树)

Minimum Inversion Number [题目链接]Minimum Inversion Number [题目类型]最小逆序数线段树 &题意: 求一个数列经过n次变换得到的数列其中的最小逆序数 &题解: 先说一下逆序数的概念: 在一个排列中,如果一对数的前后位置与大小顺序相反,即前面的数大于后面的数,那末它们就称为一个逆序. 一个排列中逆序的总数就称为这个排列的逆序数.逆序数为偶数的排列称为偶排列:逆序数为奇数的排列称为奇排列. 如2431中,21,43,41,31是逆序,逆序数…

HDU 1394 Minimum Inversion Number（最小逆序数/暴力线段树树状数组归并排序）

题目链接: 传送门 Minimum Inversion Number Time Limit: 1000MS Memory Limit: 32768 K Description The inversion number of a given number sequence a1, a2, ..., an is the number of pairs (ai, aj) that satisfy i < j and ai > aj. For a given sequence of numbe…

ACM Minimum Inversion Number 解题报告 -线段树

C - Minimum Inversion Number Time Limit:1000MS Memory Limit:32768KB 64bit IO Format:%I64d & %I64u Description The inversion number of a given number sequence a1, a2, ..., an is the number of pairs (ai, aj) that satisfy i < j and ai > aj.…

【hdu1394】Minimum Inversion Number

Problem Description The inversion number of a given number sequence a1, a2, ..., an is the number of pairs (ai, aj) that satisfy i < j and ai > aj. For a given sequence of numbers a1, a2, ..., an, if we move the first m >= 0 numbers to the end of…

[hdu1394]Minimum Inversion Number(树状数组)

Minimum Inversion Number Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 18395 Accepted Submission(s): 11168 Problem Description The inversion number of a given number sequence a1, a2, ..., a…

HDU-1394 Minimum Inversion Number 线段树+逆序对

仍旧在练习线段树中..这道题一开始没有完全理解搞了一上午,感到了自己的shabi.. Minimum Inversion Number Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 15527 Accepted Submission(s): 9471 Problem Description The inversion number of a…