解析:从前往后找第一个不符合位置的,从后往前找,找到第一个不符合的位置,然后就翻转这一段,判断反转后的结果是否为升序序列 #include <bits/stdc++.h> using namespace std; const int maxn = 1e5+1000; int a[maxn]; int main(void) { int n; cin>>n; for(int i=0;i<n;i++) scanf("%d",...
http://codeforces.com/contest/451/problem/B 【算法】 模拟 在序列中找到一段单调递增的子序列,将这段序列反转,然后判断序列是否变得单调递增,即可 【代码】 #include<bits/stdc++.h>usingnamespacestd;constintMAXN = 1e5 +10;inti,n,l,r;boolflag;inta[MAXN];intmain() { scanf("%d",&n);for(i ...
【模拟】【codeforces】451B Sort the Array http://acm.hust.edu.cn/vjudge/problem/viewProblem.action?id=52107 给出一个数列,问截取哪一部分连续子列进行翻转可以使整个数列升序排列, 如果有这样的字串输出yes和截取位置,没有输出no 就是先记录原始位置进行排序,之后一旦发现一个元素排序后更改了位置那它就被...
Unfortunately, the size ofais too small. You want a bigger array! Your friends agree to give you a bigger array, but only if you are able to answer the following question correctly: is it possible to sort the arraya(in increasing order) by reversingexactly onesegment ofa? See definitions ...
【Codeforces 258B】 Sort the Array i++ 【题目链接】 http://codeforces.com/contest/451/problem/B 【算法】 模拟 在序列中找到一段单调递增的子序列,将这段序列反转,然后判断序列是否变得单调递增,即可 【代码】 #include<bits/stdc++.h>usingnamespacestd;constintMAXN = 1e5 +10;inti,n,l,r;bool...
Given an array of integers (duplicates are possible), find the minimum number of swaps to sort the array. For [3,9,2,4,2] it should be 2 : [3, 9, 2, 4, 2] -> [2, 9, 3, 4, 2] -> [2, 2, 3, 4, 9] If the elements are distinct then there's a time complexity O...
codeforces 949B :A Leapfrog in the Array 找规律 2019-12-09 15:22 −题意: 现在给你一个n,表示有2*n-1个方格,第奇数方格上会有一个数字 1-n按顺序放。第偶数个方格上是没有数字的。变动规则是排在最后一个位置的数字,移动到它前边最近的空位 。 直到数字之间没有空位。之后有q次询问。每次问你这...
You can observe the third argument is sorting the array based on the above results. Since (even) % 2 < (odd) % 2, all the even elements will get pushed to left extremity of the array and vice versa for odd elements. Now if you want to preserve the non-decreasing nature on the two...
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For each test case, output a single integer — the minimum number of operations described above to sort the array pp in ascending order. 输入数据 1 4 5 1 5 4 2 3 3 1 2 3 4 2 1 4 3 6 5 2 4 1 6 3 Copy 输出数据 1 2 0 1 3 Copy Note In the first example, you can ...