Can the dijkstra algorithm calculate a minimum path for any cumulative function whose value can only increase or persist while iterating through the path? Say, we want to find a path from one vertex to all other vertex, whose bitwise-or of the weights is minimal. Can we use dijkstra in ...
I used dijkstra algorithm to solve it. I generally use the template from here, but in this question, this implementation gave me WA. When I used another implementation using visited array, it gave AC. WA code AC Code Naturally, I adopted the visited array approach and discarded the one ...
#include<iostream>#include<cstring>#include<string>#include<vector>#include<queue>#include<algorithm>usingnamespacestd;typedeflonglongll;constintmaxn =1005;constintmaxm =20010;//注意这里constll INF =1000000000000000000;intn, m, l, s, t, cnt,tot;intS[maxm], T[maxm];structEdge{intfrom, t...
The first line contains an integerT(1 ≤ T ≤ 250), whereTis the number of test cases. The first line of each test case contains three integersn,s, ande(1 ≤ n ≤ 250)(1 ≤ s, e ≤ n), wherenis the number of magical numbers,sis the index of the...
#include<algorithm>#include<queue>#include#include<vector>#include<set>#include<string>#include<cmath>#include<cstring>#define ll long long#define pb push_back#define pm make_pairusing namespace std;const int MAX = 2e5 + 5;char s[MAX],t[MAX];int main(){ cin>>(s+1); cin>>(t+1...
SampleInput251035S... 02015年7月5日7,231STL,堆,dijkstra 「CF545X」Codeforces Round #303 (Div. 2) A.ToyCars模拟[crayon-6808fa5646637192378197/]B.EquidistantString[crayon-6808fa5646640414408848/]C.Woodcutters给n棵树在一维数轴上的坐标,以及它们的高度。现在要你砍倒这些树,树可以向左倒也可以向右倒...
如果小于200, 我们就用到了Floyd求最小环的技巧. #include <algorithm> #include <iterator> #include <iostream> #include <cstring> #include &Aizu-2249 Road Construction(dijkstra求最短路) Aizu - 2249 题意:国王本来有一个铺路计划,后来发现太贵了,决定删除计划中的某些边,但是有2个原则,1:所有的城市...
#include <algorithm> //#define gc() getchar() #define MAXIN 300000 #define gc() (SS==TT&&(TT=(SS=IN)+fread(IN,1,MAXIN,stdin),SS==TT)?EOF:*SS++) #define mp std::make_pair #define pr std::pair<LL,int> #define mod 1000000007 #define mod2 805306457 typedef long long LL; ...
单源最短路问题(SSSP)常用的算法有Dijkstra,Bellman-Ford,这两个算法进行优化,就有了Dijkstra+heap、SPFA(Shortest Path Faster Algorithm)算法。这两个算法写起来非常相似。下面就从他们的算法思路、写法和适用场景上进行对比分析。如果对最短路算法不太了解,可先看一下相关ppt:最短路 为了解释得简单点,以及让对比更...
CodeForces - 20C Dijkstra?用SPFA T了好几发,最后加上一句if(dis[a]>dis[n-1]) continue; 就过了,还有就是记得开long long#include<queue> #include<stack> #include<cstring> #include<vector> #include<iostream> #include<algorithm> using namespace std; typedef long long ll; const int N=200000...