[模板]BFS #include <stdio.h> #include <string.h> #include <queue> using namespace std; struct node { int x,y,step; }; ][]; ][]; ][]= {,,-,,,,,-}; int n,m,sx,sy,ex,ey,ans; int check(int x,int y) { || x>=n || y< || y>=m) ; if(vis[x]…

题目链接:http://poj.org/problem?id=3278 Description Farmer John has been informed of the location of a fugitive cow and wants to catch her immediately. He starts at a point N (0 ≤ N ≤ 100,000) on a number line and the cow is at a point K (0 ≤ K ≤ 100,000…

Cow Marathon Time Limit: 2000MS   Memory Limit: 30000K Total Submissions: 7536   Accepted: 3559 Case Time Limit: 1000MS Description After hearing about the epidemic of obesity in the USA, Farmer John wants his cows to get more exercise, so he has com…

该模板来自大白书 [解释] 给多个语句,每个语句为“ Xi为真(假) 或者 Xj为真(假)” 每个变量和拆成两个点 2*i为假, 2*i+1为真 “Xi为真 或 Xj为真”  等价于 “Xi为假 –>  Xj为真”. DFS算法没有回溯过程. [函数说明] 模板bfs函数在模板外一般用不到 void init(int n) :初始化 void add(int x,int xval,int y,int yval) :添加边,x,y为节点编号,xval=1表示真,xval=0表示假,yval同理 b…

https://www.luogu.org/problemnew/show/P1443 模板BFS...... #include<iostream> #include<cstdio> #include<algorithm> #include<cstring> #include<cmath> #include<string> #include<cmath> #include<set> #include<ve…

#include<iostream> #include<cstdio> #include<cstring> #include<queue> using namespace std; #define INF 0x7f struct node{ int x, y; int cont; }; bool inq[8][8]; node cb[9][9]; char s1[3],s2[3]; int sx, sy, ex, ey, dx, dy; int d[8][2…

/* *POJ 3414 *简单模板bfs *编程应该为了方便理解,尽量提供接口 */ #include<cstdio> #include<algorithm> #include<cstring> #include<cmath> #include<queue> using namespace std; const int maxn=1e2+10; int VA,VB,VC; bool inq[maxn][maxn]; vector<int&…

CF677D Vanya and Treasure 有一个 \(n\times m\) 的矩阵 \(a(1\le a_{i,j}\le p)\),求从起点 \((1,1)\) 出发依次遍历值为 \(1\to p\) 的矩阵单元的最短路径曼哈顿距离.保证满足 \(a_{i,j}=p\) 的 \((i,j)\) 唯一. 数据范围:\(1\le n,m\le 300\),\(1\le p\le n\cdot m\). 先记录 \(\tt vector\) 数组 \(w\),\(w_t\) 表示 \(a…

//标准的层次遍历模板 //居然因为一个j写成了i,debug半天.....解题前一定要把结构和逻辑想清楚,不能着急动手,理解清楚题意,把处理流程理清楚再动手,恍恍惚惚的写出来自己慢慢debug吧 #include<cstdio>#include<vector>#include<queue>#include<algorithm>using namespace std;const int maxn=1001;struct node{ int level; ve…

转自:欣哥 下面是bfs一般的形式,谈不上模板但一般都这么来做有点乱有什么多交流 bfs一般用于求最短时间 #include<stdio.h>#include<queue>using namespace std; 上面是头文件定义 struct stu 开两个结构体abc,xyz,一般都开两个{ int x; int y; int t;}abc,xyz; queue<struct stu> p; 定义一个struct stu型STL队列 int dir[4][2]={{…