{"id":225,"date":"2010-04-17T11:41:00","date_gmt":"2010-04-17T03:41:00","guid":{"rendered":"http:\/\/localhost\/?p=225"},"modified":"2010-04-17T11:41:00","modified_gmt":"2010-04-17T03:41:00","slug":"usaco2007_febthe_cow_lexicon","status":"publish","type":"post","link":"https:\/\/www.shuizilong.com\/wjmzbmr\/?p=225","title":{"rendered":"[Usaco2007 Feb]The Cow Lexicon"},"content":{"rendered":"\n

[Usaco2007 Feb]The Cow Lexicon<\/p>\n

Time Limit:5000MS  Memory Limit:65536K
Total Submit:8 Accepted:7
Case Time Limit:1000MS<\/p>\n

Description <\/strong><\/p>\n

\u6ca1\u6709\u51e0\u4e2a\u4eba\u77e5\u9053,\u5976\u725b\u6709\u5979\u4eec\u81ea\u5df1\u7684\u5b57\u5178,\u91cc\u9762\u7684\u6709W (1 \u2264 W \u2264 600)\u4e2a\u8bcd,\u6bcf\u4e2a\u8bcd\u7684\u957f\u5ea6\u4e0d\u8d85\u8fc725,\u4e14\u7531\u5c0f\u5199\u5b57\u6bcd\u7ec4\u6210.\u5979\u4eec\u5728\u4ea4\u6d41\u65f6,\u7531\u4e8e\u5404\u79cd\u539f\u56e0,\u7528\u8bcd\u603b\u662f\u4e0d\u90a3\u4e48\u51c6\u786e.\u6bd4\u5982,\u8d1d\u831c\u542c\u5230\u6709\u4eba\u5bf9\u5979 \u8bf4"browndcodw",\u786e\u5207\u7684\u610f\u601d\u662f"browncow",\u591a\u51fa\u4e86\u4e24\u4e2a"d",\u8fd9\u4e24\u4e2a"d"\u5927\u6982\u662f\u8eab\u8fb9\u7684\u566a\u97f3. <\/p>\n

\u5976\u725b\u4eec\u53d1\u89c9\u8fa8\u8ba4\u90a3\u4e9b\u5947\u602a\u7684\u4fe1\u606f\u5f88\u8d39\u52b2,\u6240\u4ee5\u5979\u4eec\u5c31\u60f3\u8ba9\u4f60\u5e2e\u5fd9\u8fa8\u8ba4\u4e00\u6761\u6536\u5230\u7684\u6d88\u606f,\u5373\u4e00\u4e2a\u53ea\u5305\u542b\u5c0f\u5199\u5b57\u6bcd\u4e14\u957f\u5ea6\u4e3aL (2 \u2264 L \u2264 300)\u7684\u5b57\u7b26\u4e32.\u6709\u4e9b\u65f6\u5019,\u8fd9\u4e2a\u5b57\u7b26\u4e32\u91cc\u4f1a\u6709\u591a\u4f59\u7684\u5b57\u6bcd,\u4f60\u7684\u4efb\u52a1\u5c31\u662f\u627e\u51fa\u6700\u5c11\u53bb\u6389\u51e0\u4e2a\u5b57\u6bcd\u5c31\u53ef\u4ee5\u4f7f\u8fd9\u4e2a\u5b57\u7b26\u4e32\u53d8\u6210\u51c6\u786e\u7684"\u725b\u8bed"(\u5373\u5976\u725b\u5b57\u5178\u4e2d\u67d0\u4e9b\u8bcd \u7684\u4e00\u4e2a\u6392\u5217). <\/p>\n

<\/p>\n

Input <\/strong><\/p>\n

\u7b2c1\u884c:\u4e24\u4e2a\u7528\u7a7a\u683c\u9694\u5f00\u7684\u6574\u6570,W\u548cL.
\u7b2c2\u884c:\u4e00\u4e2a\u957f\u5ea6\u4e3aL\u7684\u5b57\u7b26\u4e32,\u8868\u793a\u6536\u5230\u7684\u4fe1\u606f.
\u7b2c3\u884c\u81f3\u7b2cW+2\u884c:\u5976\u725b\u7684\u5b57\u5178,\u6bcf\u884c\u4e00\u4e2a\u8bcd. <\/p>\n

Output <\/strong><\/p>\n

\u552f\u4e00\u4e00\u884c:\u4e00\u4e2a\u6574\u6570,\u8868\u793a\u6700\u5c11\u53bb\u6389\u51e0\u4e2a\u5b57\u6bcd\u5c31\u53ef\u4ee5\u4f7f\u4e4b\u53d8\u6210\u51c6\u786e\u7684"\u725b\u8bed". <\/p>\n

Sample Input <\/strong><\/p>\n

6 10
browndcodw
cow
milk
white
black
brown
farmer<\/p>\n

Sample Output <\/strong><\/p>\n

2<\/p>\n

Source<\/strong><\/p>\n

\u4e00\u822c\u6765\u8bf4\u5bf9\u4ed8\u8fd9\u79cd\u5b57\u7b26\u4e32\u5339\u914d\u7684\u95ee\u9898\u90fd\u662f\u8981\u7528Dp\u7684\u3002\u3002
\u8fd9\u9053\u9898\u7528Dp\uff08i,s,p\uff09\u8868\u793a\u5f53\u524d\u7b2c\u5339\u914d\u5230\u7b2ci\u4e2a\u5b57\u7b26\uff0c\u6700\u672b\u662f\u7b2cs\u4e2a\u5355\u8bcd\u7684\u957f\u4e3ap\u7684\u524d\u7f00\u3002\u3002
\u7136\u540e\u5bf9\u4e8e\u6bcf\u4e2a\u5b57\u7b26\u5f00\u4e2avector\u8bb0\u5f55\u51fa\u73b0\u8fc7\u7684\u4f4d\u7f6e\uff0c\u540c\u65f6\u7528MaxEnd\u8bb0\u5f55\u5f53\u65f6\u53ef\u4ee5\u5f00\u65b0\u4e32\u7684\u4f4d\u7f6e\u7684Dp\u6700\u5927\u503c\uff08\u7528\u4e8e\u8f6c\u79fb\u4e32\u7684\u7b2c\u4e00\u4e2a\u9876\u70b9\uff09\u3002\u3002\u6ce8\u610fvector\u8981\u6392\u4e2a\u5e8f\u4ee5\u9632\u6b62\u540e\u6548\u6027\u3002\u3002
\u5c31\u53ef\u4ee5\u4e86\u3002\u3002\u5177\u4f53\u770bCode\u5427(*^__^*) \u563b\u563b\u3002\u3002
Code\uff1a
<\/strong><\/p>\n

#include <vector>
#include <algorithm>
#include <utility>
#include <iostream>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#define rep(i,n) for(int i=0;i<n;i++)
#define pb push_back
const int inf=~0U>>2,maxw=600,maxn=300,maxl=26;
using namespace std;
string S[maxw],A;
int w,l;
int Dp[maxw][maxl]={0};
struct state
{
int s,p;
state(int _s,int _p):s(_s),p(_p){}
bool operator<(const state&o)const
{return p>o.p;}
};
vector<state> P[maxl];
int main()
{
\/\/freopen("in","r",stdin);
cin>>w>>l;
cin>>A;
rep(i,w)
{
cin>>S[i];
rep(j,S[i].size())
{
P[S[i][j]-‘a’].pb(state(i,j));
Dp[i][j]=-inf;
}
}
rep(i,26)sort(P[i].begin(),P[i].end());
int MaxEnd=0;
rep(t,l)
{
int c=A[t]-‘a’;int nextMaxEnd=MaxEnd;
for(vector<state>::iterator i=P.begin();i!=P.end();i++)
{
if(!i->p)Dp[i->s][i->p]=MaxEnd+1;
else Dp[i->s][i->p]>?=Dp[i->s][i->p-1]+1;
if(i->p==S[i->s].size()-1)nextMaxEnd>?=Dp[i->s][i->p];
}
MaxEnd=nextMaxEnd;
}
cout<<l-MaxEnd<<endl;
}<\/p>\n","protected":false},"excerpt":{"rendered":"

[Usaco2007 Feb]The Cow Lexicon Time Limit:5000MS  Memory Limit:65536KTotal Submit:8 Accepted:7 Case Time Limit:1000MS Description \u6ca1\u6709\u51e0\u4e2a\u4eba\u77e5\u9053,\u5976\u725b\u6709\u5979\u4eec\u81ea\u5df1\u7684\u5b57\u5178,\u91cc\u9762\u7684\u6709W (1 \u2264 W \u2264 600)\u4e2a\u8bcd,\u6bcf\u4e2a\u8bcd\u7684\u957f\u5ea6\u4e0d\u8d85\u8fc725,\u4e14\u7531\u5c0f\u5199\u5b57\u6bcd\u7ec4\u6210.\u5979\u4eec\u5728\u4ea4\u6d41\u65f6,\u7531\u4e8e\u5404\u79cd\u539f\u56e0,\u7528\u8bcd\u603b\u662f\u4e0d\u90a3\u4e48\u51c6\u786e.\u6bd4\u5982,\u8d1d\u831c\u542c\u5230\u6709\u4eba\u5bf9\u5979 \u8bf4"browndcodw",\u786e\u5207\u7684\u610f\u601d\u662f"browncow",\u591a\u51fa\u4e86\u4e24\u4e2a"d",\u8fd9\u4e24\u4e2a"d"\u5927\u6982\u662f\u8eab\u8fb9\u7684\u566a\u97f3. \u5976\u725b\u4eec\u53d1\u89c9\u8fa8\u8ba4\u90a3\u4e9b\u5947\u602a\u7684\u4fe1\u606f\u5f88\u8d39\u52b2,\u6240\u4ee5\u5979\u4eec\u5c31\u60f3\u8ba9\u4f60\u5e2e\u5fd9\u8fa8\u8ba4\u4e00\u6761\u6536\u5230\u7684\u6d88\u606f,\u5373\u4e00\u4e2a\u53ea\u5305\u542b\u5c0f\u5199\u5b57\u6bcd\u4e14\u957f\u5ea6\u4e3aL (2 \u2264 L \u2264 300)\u7684\u5b57\u7b26\u4e32.\u6709\u4e9b\u65f6\u5019,\u8fd9\u4e2a\u5b57\u7b26\u4e32\u91cc\u4f1a\u6709\u591a\u4f59\u7684\u5b57\u6bcd,\u4f60\u7684\u4efb\u52a1\u5c31\u662f\u627e\u51fa\u6700\u5c11\u53bb\u6389\u51e0\u4e2a\u5b57\u6bcd\u5c31\u53ef\u4ee5\u4f7f\u8fd9\u4e2a\u5b57\u7b26\u4e32\u53d8\u6210\u51c6\u786e\u7684"\u725b\u8bed"(\u5373\u5976\u725b\u5b57\u5178\u4e2d\u67d0\u4e9b\u8bcd \u7684\u4e00\u4e2a\u6392\u5217). Input \u7b2c1\u884c:\u4e24\u4e2a\u7528\u7a7a\u683c\u9694\u5f00\u7684\u6574\u6570,W\u548cL. \u7b2c2\u884c:\u4e00\u4e2a\u957f\u5ea6\u4e3aL\u7684\u5b57\u7b26\u4e32,\u8868\u793a\u6536\u5230\u7684\u4fe1\u606f. \u7b2c3\u884c\u81f3\u7b2cW+2\u884c:\u5976\u725b\u7684\u5b57\u5178,\u6bcf\u884c\u4e00\u4e2a\u8bcd. Output \u552f\u4e00\u4e00\u884c:\u4e00\u4e2a\u6574\u6570,\u8868\u793a\u6700\u5c11\u53bb\u6389\u51e0\u4e2a\u5b57\u6bcd\u5c31\u53ef\u4ee5\u4f7f\u4e4b\u53d8\u6210\u51c6\u786e\u7684"\u725b\u8bed". Sample Input 6 10browndcodwcowmilkwhiteblackbrownfarmer Sample Output 2 Source \u4e00\u822c\u6765\u8bf4\u5bf9\u4ed8\u8fd9\u79cd\u5b57\u7b26\u4e32\u5339\u914d\u7684\u95ee\u9898\u90fd\u662f\u8981\u7528Dp\u7684\u3002\u3002\u8fd9\u9053\u9898\u7528Dp\uff08i,s,p\uff09\u8868\u793a\u5f53\u524d\u7b2c\u5339\u914d\u5230\u7b2ci\u4e2a\u5b57\u7b26\uff0c\u6700\u672b\u662f\u7b2cs\u4e2a\u5355\u8bcd\u7684\u957f\u4e3ap\u7684\u524d\u7f00\u3002\u3002\u7136\u540e\u5bf9\u4e8e\u6bcf\u4e2a\u5b57\u7b26\u5f00\u4e2avector\u8bb0\u5f55\u51fa\u73b0\u8fc7\u7684\u4f4d\u7f6e\uff0c\u540c\u65f6\u7528MaxEnd\u8bb0\u5f55\u5f53\u65f6\u53ef\u4ee5\u5f00\u65b0\u4e32\u7684\u4f4d\u7f6e\u7684Dp\u6700\u5927\u503c\uff08\u7528\u4e8e\u8f6c\u79fb\u4e32\u7684\u7b2c\u4e00\u4e2a\u9876\u70b9\uff09\u3002\u3002\u6ce8\u610fvector\u8981\u6392\u4e2a\u5e8f\u4ee5\u9632\u6b62\u540e\u6548\u6027\u3002\u3002\u5c31\u53ef\u4ee5\u4e86\u3002\u3002\u5177\u4f53\u770bCode\u5427(*^__^*) \u563b\u563b\u3002\u3002Code\uff1a #include <vector>#include <algorithm>#include <utility>#include <iostream>#include <cstdio>#include <cmath>#include <cstdlib>#define rep(i,n) for(int i=0;i<n;i++)#define […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[10],"tags":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=\/wp\/v2\/posts\/225"}],"collection":[{"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=225"}],"version-history":[{"count":0,"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=\/wp\/v2\/posts\/225\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=225"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=225"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=225"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}