#include<cstdio> #include<cstring> #include<algorithm> using namespace std; ; int tm[N]; int main() { int n, m; while (~scanf("%d%d", &n, &m)) { ; i <= n; i++) { tm[i] = i; } m--; while (m--) { next_permutation(tm +…

传送门 来源:牛客网题目描述:小w不会离散数学,所以她van的图论游戏是送分的小w有一张n个点n-1条边的无向联通图,每个点编号为1~n,每条边都有一个长度小w现在在点x上她想知道从点x出发经过每个点至少一次,最少需要走多少路输入描述:第一行两个整数 n,x,代表点数,和小w所处的位置第二到第n行,每行三个整数 u,v,w,表示u和v之间有一条长为w的道路输出描述:一个数表示答案示例1输入3 11 2 12 3 1输出2备注:1 ≤ n ≤ 50000 , 1 ≤ w ≤ 2147483647…

1651: [Usaco2006 Feb]Stall Reservations 专用牛棚 Time Limit: 10 Sec  Memory Limit: 64 MBSubmit: 509  Solved: 280[Submit][Status] Description Oh those picky N (1 <= N <= 50,000) cows! They are so picky that each one will only be milked over some precise…

线段树.. -------------------------------------------------------------------------------------- #include<cstdio> #include<cstring> #include<algorithm> #include<iostream>   #define rep( i , n ) for( int i = 0 ; i < n ; i++ ) #define…

题目 1651: [Usaco2006 Feb]Stall Reservations 专用牛棚 Time Limit: 10 Sec  Memory Limit: 64 MBSubmit: 553  Solved: 307[Submit][Status] Description Oh those picky N (1 <= N <= 50,000) cows! They are so picky that each one will only be milked over some preci…

1651: [Usaco2006 Feb]Stall Reservations 专用牛棚 Time Limit: 10 Sec  Memory Limit: 64 MBSubmit: 566  Solved: 314[Submit][Status] Description Oh those picky N (1 <= N <= 50,000) cows! They are so picky that each one will only be milked over some precise…

Kuma Rider久违的第二场训练,这场很水,又在vj的榜单上看到第一场的大哥了,2小时ak,大哥牛啤! A.水 #include<cstdio> #include<iostream> #include<algorithm> #include<queue> #include<cstring> #include<string> #include<vector> #include<cmath> #include&…

http://www.lydsy.com/JudgeOnline/problem.php?id=1651 很奇妙.. 我们发现,每一时刻的重叠数选最大的就是答案.... orz 那么我们可以线段树维护每个点的次数... 然后就ok了.. 第二种做法:用前缀和来维护即可... 线段树: #include <cstdio> #include <cstring> #include <cmath> #include <string> #include <ios…

Description Oh those picky N (1 <= N <= 50,000) cows! They are so picky that each one will only be milked over some precise time interval A..B (1 <= A <= B <= 1,000,000), which includes both times A and B. Obviously, FJ must create a reserv…

1664 清凉冷水 时间限制: 1 s 空间限制: 128000 KB 题目等级 : 黄金 Gold         题目描述 Description 闷热的夏天,威斯康辛州的奶制品地区提供冷水供奶牛饮用,以此来解渴.农夫约翰将冷水通过N (3 <= N <= 99999; N 为奇数)个冷水管道,分别编号序号1..N从泵的位置一直送到牛棚里.当水在管道中流动时,夏天的热能使它变热.贝茜想要找到最冷的水,这样她就能比任何其他奶牛更好地享受这难得的好天气. 她已经绘制了一整套完整的分支管道,并注…