Permutation Recovery Time Limit: 10000/4000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 456    Accepted Submission(s): 316 Problem Description Professor Permula gave a number of permutations of the n integers 1,…

Anton likes permutations, especially he likes to permute their elements. Note that a permutation of n elements is a sequence of numbers {a1, a2, ..., an}, in which every number from 1 to n appears exactly once. One day Anton got a new permutation and…

Minimum Inversion Number Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 18543    Accepted Submission(s): 11246 Problem Description The inversion number of a given number sequence a1, a2, ..., a…

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…

Crossings Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100463 Description Given a permutation P of {0, 1, ..., n − 1}, we define the crossing number of it as follows. Write the sequence 0, 1, 2, . . . , n − 1 from left to ri…

Minimum Inversion Number Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 13036    Accepted Submission(s): 7968 Problem Description The inversion number of a given number sequence a1, a2, ..., an…

``Dynamic'' Inversion Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=3141 Description You are given a permutation f1,2,3,. . . ,ng. Remove m of them…

Permutation Recovery Time Limit: 10000/4000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 451    Accepted Submission(s): 312 Problem Description Professor Permula gave a number of permutations of the n integers 1,…

Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 20404 Accepted Submission(s): 12231 Problem Description The inversion number of a given number sequence a1, a2, -, an is the number of pairs (ai, aj…

Crossings Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100463 Description Given a permutation P of {0, 1, ..., n − 1}, we define the crossing number of it as follows. Write the sequence 0, 1, 2, . . . , n − 1 from left to ri…