LUOGU P1937 [USACO10MAR]仓配置Barn Allocation

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LUOGU P1937 [USACO10MAR]仓配置Barn Allocation

传送门解题思路扫了一眼觉得是贪心+线段树,结果贪心的时候刚开始按区间长度排的序..这还有82分,后来叉了自己,换成按右端点排序过了. 代码 #include<iostream> #include<cstdio> #include<cstring> #include<cmath> #include<algorithm> using namespace std; const int MAXN = 100005; inline int rd(){…

洛谷P1937 [USACO10MAR]仓配置Barn Allocation

题目描述 Farmer John recently opened up a new barn and is now accepting stall allocation requests from the cows since some of the stalls have a better view of the pastures. The barn comprises N (1 <= N <= 100,000) stalls conveniently numbered 1..N; stal…

AC日记——[USACO10MAR]仓配置Barn Allocation 洛谷 P1937

[USACO10MAR]仓配置Barn Allocation 思路: 贪心+线段树维护: 代码: #include <bits/stdc++.h> using namespace std; #define maxn 100005 #define INF 0x3f3f3f3f #define maxtree maxn<<2 struct QueryType { int l,r; bool operator<(const QueryType pos)const { if(pos.…

洛谷 1937 [USACO10MAR]仓配置Barn Allocation

[题解] 贪心. 把区间按照右端点从小到大排序,右端点相同的按照长度从小到大排序,然后按顺序考虑,能放就放下去. 维护能不能放下去用线段树即可. #include<cstdio> #include<cstring> #include<algorithm> #define LL long long #define rg register #define N 100010 #define ls (u<<1) #define rs (u<<1|1) u…

【Luogu1973】仓配置（贪心，线段树）

[Luogu1973]仓配置题面直接找洛谷把... 题解很明显的贪心吧按照线段的右端点为第一关键字,左端点第二关键字排序然后线段树维护区间最小就可以啦 #include<iostream> #include<cstdio> #include<cstdlib> #include<cstring> #include<cmath> #include<algorithm> #include<set> #include&l…

【Luogu1937】仓配置（贪心，线段树）

[Luogu1937]仓配置题面直接找洛谷把... 题解很明显的贪心吧按照线段的右端点为第一关键字,左端点第二关键字排序然后线段树维护区间最小就可以啦 #include<iostream> #include<cstdio> #include<cstdlib> #include<cstring> #include<cmath> #include<algorithm> #include<set> #include&l…

【题解】Luogu p2986 [USACO10MAR]伟大的奶牛聚集Great Cow Gat 树型dp

题目描述 Bessie is planning the annual Great Cow Gathering for cows all across the country and, of course, she would like to choose the most convenient location for the gathering to take place. Bessie正在计划一年一度的奶牛大集会,来自全国各地的奶牛将来参加这一次集会.当然,她会选择最方便的地点来举办这次集会…