题目链接:http://codeforces.com/problemset/problem/489/A 题目意思:给出一个 n 个无序的序列,问能通过两两交换,需要多少次使得整个序列最终呈现非递减形式.这个交换次数最多为 n 次.如果原来已经非递减排列好,输出次数为0:否则不但要输出次数,还需要输出每次交换的数组下标. 比赛的时候想复杂了,用了pair来记录值和坐标,还要开多一个pair类型的 b 数组来保存已排好序的序列,然后跟原序列比较......哪个复杂啊---然后校园网12:00 断网了…
SwapSort 题目链接: http://acm.hust.edu.cn/vjudge/contest/121332#problem/A Description In this problem your goal is to sort an array consisting of n integers in at most n swaps. For the given array find the sequence of swaps that makes the array sorted in…
A. SwapSort time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output In this problem your goal is to sort an array consisting of n integers in at most n swaps. For the given array find the sequence…
题 Description In this problem your goal is to sort an array consisting of n integers in at most n swaps. For the given array find the sequence of swaps that makes the array sorted in the non-descending order. Swaps are performed consecutively, one af…
题意: 给n个整数(可能有重复),输出一个不超过n次交换的方案,使得经过这n次交换后,整个序列正好是非递减的. 分析: 首先说题解给的算法. 从左到右扫一遍,交换第i个数和它后面最小的那个数. 代码看起来大概是这个样子的: ; i < n; i++) { int j = i; for (int t = i; t < n; t++) if (a[j] > a[t]) j = t; if (i != j) answer.push_back(make_pair(i, j)); swap(a[i…
http://codeforces.com/problemset/problem/489/A A. SwapSort time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output In this problem your goal is to sort an array consisting of n integers in at most …
A. SwapSort time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output In this problem your goal is to sort an array consisting of n integers in at most n swaps. For the given array find the sequence…
http://codeforces.com/contest/489 Problems # Name A SwapSort standard input/output 1 s, 256 MB x2668 B BerSU Ball standard input/output 1 s, 256 MB x2659 C Given Length and Sum of Digits... standard input/output 1 s, 256 MB x2261 D U…
