POJ2983 Is the Information Reliable?】的更多相关文章

http://acm.sdut.edu.cn:8080/vjudge/contest/view.action?cid=267#problem/B                        B - Is the Information Reliable? Time Limit:3000MS     Memory Limit:131072KB     64bit IO Format:%I64d & %I64u Description The galaxy war between the Empi…
Is the Information Reliable? Time Limit: 3000MS   Memory Limit: 131072K Total Submissions: 11125   Accepted: 3492 Description The galaxy war between the Empire Draco and the Commonwealth of Zibu broke out 3 years ago. Draco established a line of defe…
B - Is the Information Reliable? Time Limit:3000MS     Memory Limit:131072KB     64bit IO Format:%I64d & %I64u Submit Status Description The galaxy war between the Empire Draco and the Commonwealth of Zibu broke out 3 years ago. Draco established a l…
id=2983">[POJ 2983]Is the Information Reliable? (差分约束系统) Is the Information Reliable? Time Limit: 3000MS   Memory Limit: 131072K Total Submissions: 12244   Accepted: 3861 Description The galaxy war between the Empire Draco and the Commonwealth of…
Time Limit: 3000MS Memory Limit: 131072K Description The galaxy war between the Empire Draco and the Commonwealth of Zibu broke out 3 years ago. Draco established a line of defense called Grot. Grot is a straight line with N defense stations. Because…
http://poj.org/problem?id=2983 (题目链接) 一个SB错误TLE了半个小时... 题意 一条直线上有n个点,给出m条信息,若为P则表示点A在点B的北方X米,若为V则表示A在B的北方.判断给出的信息是否合法. Solution 对于P,A-B=X等价于是A-B>=X && A-B<=X(B-A>=-X). 对于V,A-B>=1. 所以我们就可以利用差分约束去求解这个问题,在图上跑SPFA最长路判断是否存在正环. 注意设置一个超级源点使得图…
Description The galaxy war between the Empire Draco and the Commonwealth of Zibu broke out 3 years ago. Draco established a line of defense called Grot. Grot is a straight line with N defense stations. Because of the cooperation of the stations, Zibu…
Description The galaxy war between the Empire Draco and the Commonwealth of Zibu broke out 3 years ago. Draco established a line of defense called Grot. Grot is a straight line with N defense stations. Because of the cooperation of the stations, Zibu…
Description The galaxy war between the Empire Draco and the Commonwealth of Zibu broke out 3 years ago. Draco established a line of defense called Grot. Grot is a straight line with N defense stations. Because of the cooperation of the stations, Zibu…
裸差分约束. //#pragma comment(linker, "/STACK:1024000000,1024000000") #include<cstdio> #include<cstring> #include<cstdlib> #include<algorithm> #include<iostream> #include<sstream> #include<cmath> #include<…