The Ball And Cups At the end of a busy day, The Chef and his assistants play a game together. The game is not just for fun but also used to decide who will have to clean the kitchen. The Chef is a Game Master, so his concern is how to manage the game…

http://www.codechef.com/NOV13 还在比...我先放一部分题解吧... Uncle Johny 排序一遍 struct node{ int val; int pos; }a[MAXN]; int cmp(node a,node b){ return a.val < b.val; } int main(){ int T,n,m; while(cin>>T){ while(T--){ cin>>n; ; i < n ; i++){ cin>&…

比赛链接:https://www.codechef.com/FEB18,题面和提交记录是公开的,这里就不再贴了 Chef And His Characters 模拟题 Chef And The Patents 模拟题 Permutation and Palindrome 模拟题 Car-pal Tunnel 结论比较简单 Broken Clock 求余弦的n倍角,可以用复数的快速幂解决 $cos(a)=x \\ sin(a)=\sqrt{1-x^2} \\ cos(na) = Re((x+\sq…

版权声明:本文作者靖心,靖空间地址:http://blog.csdn.net/kenden23/,未经本作者同意不得转载. https://blog.csdn.net/kenden23/article/details/25105267 You are given an N × N grid initially filled by zeros. Let the rows and columns of the grid be numbered from1 to N, inclusive. There…

题目地址https://www.codechef.com/LTIME44 Nothing in Common 签到题,随便写个求暴力交集就行了 Sealing up 完全背包算出得到长度≥x的最小花费,然后对每条边的长度向上取整分别算一下.本来也是签到题的结果我调了1h+.. Segment Queries 定义连续段为被激活的极长子串,一条线段被激活当且仅当它的两个端点在同一个连续段,用set和并查集维护连续段内的询问,修改时当前点成为新的连续段,并和两侧连续段(如果有)启发式合并一下,O(n…

https://www.codechef.com/JAN17 Cats and Dogs 签到题 #include<cstdio> int min(int a,int b){return a<b?a:b;} int main(){ int T,a,b,c; for(scanf("%d",&T);T;--T){ scanf("%d%d%d",&a,&b,&c); puts(c%==&&c/<=a+…

本题使用线段树自然能够,由于区间的问题. 这里比較难想的就是: 1 最后更新须要查询全部叶子节点的值,故此须要使用O(nlgn)时间效率更新全部点. 2 截取区间不能有半点差错.否则答案错误. 这两点卡了我下.看来我的线段树还是不够熟,须要多多练习. 线段树是二分法的高级应用,可是却不是简单应用,要锻炼好并应用好线段树思维还是比二分法难非常多的. static const int SIZE = 100005; static const int TREESIZE = SIZE<<2; int a…

Let's consider a triangle of numbers in which a number appears in the first line, two numbers appear in the second line, three in the third line, etc. Develop a program which will compute the largest of the sums of numbers that appear on the paths st…

The Little Elephant likes permutations. This time he has a permutation A[1], A[2], ..., A[N] of numbers 1, 2, ...,N. He calls a permutation A good, if the number of its inversions is equal to the number of its local inversions. The number of inversio…

The Little Elephant from the Zoo of Lviv currently is on the military mission. There are N enemy buildings placed in a row and numbered from left to right strating from 0. Each building i (except the first and the last) has exactly two adjacent build…