C - The Battle of Chibi Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 无 Description Cao Cao made up a big army and was going to invade the whole South China. Yu Zhou was worried about it. He thought the only way to beat Cao Cao is to have a spy in Cao…

C - The Battle of Chibi Description Cao Cao made up a big army and was going to invade the whole South China. Yu Zhou was worried about it. He thought the only way to beat Cao Cao is to have a spy in Cao Cao's army. But all generals and soldiers of C…

The Battle of Guandu Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 无 Description In the year of 200, two generals whose names are Cao Cao and Shao Yuan are fighting in Guandu. The battle of Guandu was a great battle and the two armies were fighting at…

D - Pick The Sticks Description The story happened long long ago. One day, Cao Cao made a special order called "Chicken Rib" to his army. No one got his point and all became very panic. However, Cao Cao himself felt very proud of his interesting…

题意:给定一个序列,找出长度为m的严格递增序列的个数. 思路:用dp[i][j]表示长度为i的序列以下标j结尾的总个数.三层for循环肯定超时,首先离散化,离散化之后就可以用树状数组来优化,快速查找下边在j之前,值比ary[j]小且长度为i-1 的个数 #include <iostream> #include <cstdio> #include <cstring> #include <algorithm> using namespace std; ; ; i…

题意:给你一个n个数的序列,要求从中找出含m个数的严格递增子序列,求能找出多少种不同的方案 dp[i][j]表示以第i个数结尾,形成的严格递增子序列长度为j的方案数 那么最终的答案应该就是sigma(dp[i][m]); 显然有:dp[i][j] = sigma(dp[k][j - 1]); 其中 1 <= k < i 且 a[k] < a[i]; 题目要求严格递增,这个限制怎么解决? hdu4719这道题同样是这样处理,即我们只需要从小到大dp就行了. 但是复杂度是O(n^3)的,显然…

Ba Gua Zhen Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 无 Description During the Three-Kingdom period, there was a general named Xun Lu who belonged to Kingdom Wu. Once his troop were chasing Bei Liu, he was stuck in the Ba Gua Zhen from Liang Zhuge.…

L - Huatuo's Medicine Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 无 Description Huatuo was a famous doctor. He use identical bottles to carry the medicine. There are different types of medicine. Huatuo put medicines into the bottles and chain these b…

H - Sudoku Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 无 Description Yi Sima was one of the best counselors of Cao Cao. He likes to play a funny game himself. It looks like the modern Sudoku, but smaller. Actually, Yi Sima was playing it different. F…

G - Ancient Go Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 无 Description Yu Zhou likes to play Go with Su Lu. From the historical research, we found that there are much difference on the rules between ancient go and modern go. Here is the rules for a…