题意,有n只袋鼠,没每只袋鼠有个袋子,大小为si,一个袋鼠可以进入另外一个袋鼠的袋子里面,当且仅当另一个袋鼠的袋子是他的二倍或二倍一上,然后中国袋鼠就是不可见的,不能出现多个袋鼠嵌套的情况.让你求最少可见袋鼠的数量. 解题方法是先排序再贪心,贪心策略是从中间开始贪心. #include <stdio.h> #include <algorithm> const int maxn = 500005; using namespace std; int s[maxn]; int n; in…
D. Counting Rectangles is Fun time limit per test 4 seconds memory limit per test 256 megabytes input standard input output standard output There is an n × m rectangular grid, each cell of the grid contains a single integer: zero or one. Let's call t…
Counting Rectangles Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 1043 Accepted: 546 Description We are given a figure consisting of only horizontal and vertical line segments. Our goal is to count the number of all different rectangles…
Counting rectangles By counting carefully it can be seen that a rectangular grid measuring 3 by 2 contains eighteen rectangles: Although there exists no rectangular grid that contains exactly two million rectangles, find the area of the grid with the…
Description Problem H Counting Rectangles Input: Standard Input Output:Standard Output Time Limit: 3Seconds Given n points on the XY plane, count how many regular rectanglesare formed. A rectangle is regular if and only if its sides are all paralle…
Description We are given a figure consisting of only horizontal and vertical line segments. Our goal is to count the number of all different rectangles formed by these segments. As an example, the number of rectangles in the Figures 1 and 2 are 5 and…
题目链接: B. Searching Rectangles time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Filya just learned new geometry object — rectangle. He is given a field consisting of n × n unit cells. Rows ar…
Given n points on the XY plane, count how many regular rectangles are formed. A rectangle is regular if and only if its sides are all parallel to the axis.InputThe first line contains the number of tests t (1 ≤ t ≤ 10). Each case contains a single lin…
区域安全的check方法就是, 每行都有哨兵或者每列都有哨兵,然后我们用y建线段树, 维护在每个y上的哨兵的x的最值就好啦. #include<bits/stdc++.h> #define LL long long #define fi first #define se second #define mk make_pair #define PLL pair<LL, LL> #define PLI pair<LL, int> #define PII pair<in…
Discription You are given a tree consisting of nn vertices. A number is written on each vertex; the number on vertex ii is equal to aiai. Let's denote the function g(x,y)g(x,y) as the greatest common divisor of the numbers written on the vertices bel…
Codeforces Round #371 (Div. 2) A. Meeting of Old Friends |B. Filya and Homework A. Meeting of Old Friends 模拟 #include <iostream> #include <cstdio> #include <algorithm> #include <cstring> using namespace std; typedef long long ll;…
D. Counting Rectangles is Fun time limit per test 4 seconds memory limit per test 256 megabytes input standard input output standard output There is an n × m rectangular grid, each cell of the grid contains a single integer: zero or one. Let's call t…
CF传送门 因为洛谷题库未更新,所以给出的题面都是CF的. 现场打真是太卡了(梯子挂了,codeforc.es也崩了),所以五六分钟才打开题目 \(qwq\) A. Spell Check 萌萌题,把字符串放桶里,判名字每个字母是否恰好出现一次即可. \(9min\) \(AC\) \(qwq\) 都怪CF Code: #include<bits/stdc++.h> #define ll long long using namespace std; string s; int t[150],T…
