Minimum Spanning Tree Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 …

Tunnel Warfare Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java…

B. Code obfuscation 题目连接： http://codeforces.com/contest/765/problem/B Description Kostya likes Codeforces cont…

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…

1053: [HAOI2007]反素数ant 题目连接： http://www.lydsy.com/JudgeOnline/problem.php?id=1053 Description 对于任何正整数x，其约数的个数记…

Count primes 题目连接： http://acm.split.hdu.edu.cn/showproblem.php?pid=5901 Description Easy question! Calculate h…

Delay Constrained Maximum Capacity Path Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/sho…

Mahjong Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others…

题目链接：http://acm.hdu.edu.cn/showproblem.php?pid=1021 题目大意：首两项为7，11的斐波那契数列。若第n项能被3整除，输出yes，否则输出no 关键思想：模三加法情况有限，…

D. Fibonacci-ish 题目连接： http://www.codeforces.com/contest/633/problem/D Description Yash has recently learnt ab…

Brackets Sequence Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 18313   Accepted: 502…

3564: [SHOI2014]信号增幅仪 题目连接： http://www.lydsy.com/JudgeOnline/problem.php?id=3564 Description 无线网络基站在理想状况下有效信号覆…