Islands and Bridges Time Limit: 4000MS   Memory Limit: 65536K Total Submissions: 7685 &nbs…

当对问题建立数学模型后，发现其是一个差分方程组，那么问题可以转换为最短路问题，一下分别选用Bellmanford-SPFA解题     ZOJ2770-Burn the Linked Camp &nb…

两道有关欧拉回路的例题     POJ1300-Door Man   //判定是否存在从某点到0点的欧拉回路 //Time:0Ms Memory:116K #include<iostr…

http://poj.org/problem?id=1222 http://poj.org/problem?id=1830 http://poj.org/problem?id=1681 http://poj.org/pr…

Help Jimmy Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 6593 Accepted: 2066 Description “H…

Triangle Time Limit: 3000MS   Memory Limit: 30000K Total Submissions: 7625   Accepted…

EXTENDED LIGHTS OUT Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 4669   Accepted: 30…

IMMEDIATE DECODABILITY Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 8895   Accepted:…

Pyramids Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 2268   Accepted: 751   Sp…

Most Distant Point from the Sea Time Limit: 5000MS   Memory Limit: 65536K Total Submissions:&nb…

Longest Ordered Subsequence Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 19643 Accepted: 8501 De…

　　题意：给定四点的坐标(x,y)，分别确定两直线，求出其交点，若重合or平行则输出相应信息   用四个点的坐标算出直线通式(ax+by+c=0)中的a,b,c，然后利用a，b，c计算出交点坐标(其他公式不够通…