BMan、 - 博客园

UVA 10817 Headmaster's Headache 状态DP

摘要：因为每个人只能选一次，所以枚举状态的时候从大到小。读入数据比较麻烦，可以用istringstream 或sscanf 或自己写个函数逐个字符处理。//#pragma comment(linker, "/STACK:1024000000,1024000000")#include#include#include#include#include#include#include#include#include#include#include#include#include#includeusing namespace std;typedef long long ll;typedef 阅读全文

posted @ 2013-09-03 19:13 BMan、阅读(257) 评论(0) 推荐(0)

UVA 10564 Paths through the Hourglass DP

摘要：注意用long long。//#pragma comment(linker, "/STACK:1024000000,1024000000")#include#include#include#include#include#include#include#include#include#include#include#include#include#includeusing namespace std;typedef long long ll;typedef pair pii;#define pb(a) push_back(a)#define INF 0x1f1f1f1f#d 阅读全文

posted @ 2013-09-03 17:00 BMan、阅读(264) 评论(0) 推荐(0)

HDU 3397 Sequence operation 线段树成段更新区间合并

摘要：比较综合的题。两个标记 setv,xorr。setv的优先级高于xorr，当一个节点获得一个setv时，他之前的xorr要清除。//#pragma comment(linker, "/STACK:1024000000,1024000000")#include#include#include#include#include#include#include#include#include#include#include#include#include#includeusing namespace std;typedef long long ll;typedef pair pii 阅读全文

posted @ 2013-09-02 18:05 BMan、阅读(1101) 评论(0) 推荐(0)

HDU 3308 LCIS 线段树单点更新+区间合并

摘要：感觉区间合并都一个样，没什么好说的。//#pragma comment(linker, "/STACK:1024000000,1024000000")#include#include#include#include#include#include#include#include#include#include#include#include#include#includeusing namespace std;typedef long long ll;typedef pair pii;#define pb(a) push_back(a)#define INF 0x1f1f1 阅读全文

posted @ 2013-09-02 00:51 BMan、阅读(161) 评论(0) 推荐(0)

POJ 3667 Hotel 线段树区间合并

摘要：结点记录三个信息，区间最长的连续空房间，最长前缀和后缀//#pragma comment(linker, "/STACK:1024000000,1024000000")#include#include#include#include#include#include#include#include#include#include#include#include#include#includeusing namespace std;typedef long long ll;typedef pair pii;#define pb(a) push_back(a)#define IN 阅读全文

posted @ 2013-09-01 23:53 BMan、阅读(217) 评论(0) 推荐(0)

UVALive 3942 Remember the Word Tire+DP

摘要： dp[i]=sum{dp[j]},s[i...j-1]为出现过的单词，每次从s[i]开始查找全部出现的前缀s[i..j],前缀在Tire中存在则转移状态。//#pragma comment(linker, "/STACK:1024000000,1024000000")#include#include#include#include#include#include#include#include#include#include#include#include#include#includeusing namespace std;typedef long long ll;typ 阅读全文

posted @ 2013-09-01 10:51 BMan、阅读(269) 评论(0) 推荐(0)

POJ 1703 Find them, Catch them

摘要：简单带权并查集0,1关系//#pragma comment(linker, "/STACK:1024000000,1024000000")#include#include#include#include#include#include#include#include#include#include#include#include#include#includeusing namespace std;typedef long long ll;typedef pair pii;#define pb(a) push_back(a)#define INF 0x1f1f1f1f#de 阅读全文

posted @ 2013-08-22 14:44 BMan、阅读(191) 评论(0) 推荐(0)

UVA 1366 Martian Mining DP

摘要：为了方便，记从右到左运输的为A矿，从下到上运输的为B矿。首先，假如我们在第i行的前k格架了运输管道运输这K个格子的A矿，那么对于i下面的其他行最少都能架上k格管子，因为不架也是浪费，这一片区域的B矿已经不可能运输了，都被i行的管道挡住了。基于这点，当第i行前K格用来运输A矿时，剩下的第K+1,K+2...M格就能用来运输B矿，因为上面不会被挡着。dp[i][j]表示第i行，且前面最长的A型管（左右型）为j的状态。则dp[i][j]=max(dp[i+1][k]+f[i][k+1],j#include#include#include#include#include#include#include 阅读全文

posted @ 2013-08-21 15:41 BMan、阅读(261) 评论(0) 推荐(0)

UVA 1456 Cellular Network 贪心+DP

摘要： YY过程：概率大的应该先访问吧，嗯，排序一下试试。然后就AC了。。。我也不知道怎么证明这样贪心是正确。。至于DP的过程就是水题了，DP[i][j]表示从第i个开始，分成j组的最小期望//#pragma comment(linker, "/STACK:1024000000,1024000000")#include#include#include#include#include#include#include#include#include#include#include#include#include#includeusing namespace std;typedef lo 阅读全文

posted @ 2013-08-21 14:37 BMan、阅读(174) 评论(0) 推荐(0)

UVA 11573 Ocean Currents

摘要：用优先队列代替普通队列，这是不是叫权值优先搜索？注意的是与普通队列不同，需要在进队后马上标记，不能等到访问结点的时候再标记，避免多次进队导致复杂度太高。而普通队列是无所谓的。// #pragma comment(linker, "/STACK:1024000000,1024000000")#include#include#include#include#include#include#include#include#include#include#include#include#include#includeusing namespace std;typedef long 阅读全文

posted @ 2013-08-21 13:30 BMan、阅读(243) 评论(0) 推荐(0)

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