OtterVのrecorder

StarsTime Limit: 1000MS   Memory Limit: 65536K Total Submissions: 54300   Accepted: 23361 DescriptionAstronomers often examine star maps where stars are represented by points on a ...

Bubble SortTime Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 2442    Accepted Submission(s): 1197 Problem DescriptionP is a permutation of...

逆序对i<j时，a[i]>a[j]，则（a[i],a[j]）为逆序对。求解方法有两种：1）离散化树状数组      很多时候a[i]>>n，这时候就需要离散化，给序列编号。      具体理解：i为序列1~n，a[i]为初始序列，编号index[i]则为a[i]应该处于的位置；sum求得index[i]前及其自身出现过的数字，i-sum()为小于inde...