题目描述 An infinitely long railway has a train consisting of n cars, numbered from 1 to n (the numbers of all the cars are distinct) and positioned in arbitrary order. David Blaine wants to sort the railway cars in the order of increasing numbers. In on…

传送门 题目大意 给出一个 1 到 n 的排列,每次操作可以将某个位置的数字移动到最前面或最后面,求将排列从小到大排序的最小操作次数 如:4 1 2 5 3 操作1:将5和3换一下变成4 1 2 3 5 操作2:将1 2 3和 4换一下变成 1 2 3 4 5 在此后即完成要求.所以最小操作次数为2. 输入: 第一行 为长度 nnn ; 第二行为原来的顺序两个数之间有空格. 输出: 最小操作次数 解题思路 因为要从小到大排序,所以我们很自然能想到lis,但是也很容易举出反例.如1 2 4 5 3…

To CF 这道题依题意可得最终答案为序列长度-最长子序列长度. 数据范围至 \(100000\) 用 \(O(n^2)\) 的复杂度肯定会炸. 用 \(O(nlogn)\) 的复杂度却在第 \(21\) 个测试点莫名出错. 于是换一种思路可得 \(dp[s]=dp[s-1]+1\) 即类似于求最长子序列长度. 最后用序列长度-最长子序列长度即为答案. #include<cstdio> #include<iostream> using namespace std; int n; i…

Sorting Railway Cars time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output An infinitely long railway has a train consisting of n cars, numbered from 1 to n (the numbers of all the cars are dist…

C. Sorting Railway Cars   An infinitely long railway has a train consisting of n cars, numbered from 1 to n (the numbers of all the cars are distinct) and positioned in arbitrary order. David Blaine wants to sort the railway cars in the order of incr…

C. Sorting Railway Cars Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://www.codeforces.com/contest/606/problem/C Description An infinitely long railway has a train consisting of n cars, numbered from 1 to n (the numbers of all the cars are distin…

A. Sorting Railway Cars time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output An infinitely long railway has a train consisting of n cars, numbered from 1 to n (the numbers of all the cars are d…

C. Sorting Railway Cars time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output An infinitely long railway has a train consisting of n cars, numbered from 1 to n (the numbers of all the cars are d…

C. Sorting Railway Cars time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output An infinitely long railway has a train consisting of n cars, numbered from 1 to n (the numbers of all the cars are d…

time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output An infinitely long railway has a train consisting of n cars, numbered from 1 to n (the numbers of all the cars are distinct) and positioned…