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寰堣彍寰堣彍銆傘傘傚ぇ鐗涗滑瀹屽叏蹇界暐榪欎釜瑙掕惤鍚?/description>zh-cnFri, 23 Jul 2010 07:55:25 GMTFri, 23 Jul 2010 07:55:25 GMT60- ECUST鏆戞湡涓漢璧?--2010.07.20http://www.shnenglu.com/Uriel/articles/120858.htmlUrielUrielTue, 20 Jul 2010 03:37:00 GMThttp://www.shnenglu.com/Uriel/articles/120858.htmlhttp://www.shnenglu.com/Uriel/comments/120858.htmlhttp://www.shnenglu.com/Uriel/articles/120858.html#Feedback0http://www.shnenglu.com/Uriel/comments/commentRss/120858.htmlhttp://www.shnenglu.com/Uriel/services/trackbacks/120858.htmlhttp://www.cn210.com/onlinejudge/contestrank.php?contest_id=38
榪樿銆傘備袱棰樺浘璁洪兘娌″嚭鏈夌偣鎮(zhèn)插墽
Pro1: DP
Pro2: 鍥捐錛孊FS錛屾瘮璧涙椂鍊欑湅閮芥病鐪?br>Pro3: DP錛屽啓鐨勬濈淮娣蜂貢浜嗛兘銆傘?br>Pro4: 璐績錛屾瘮璧涚殑鏃跺欑敤鐨勬槸priority queue 鑾悕WA浜嗐傘傝禌鍚庢敼浜員LE浜嗐傘傝繕娌¤繃銆傘傝繖涓ゅぉ涓瀹氳榪囨帀
Pro5: 鑳屽寘DP錛屾瘮璧涙病浼樺寲TLE鏁版
Pro6: 姣旇禌鐨勬椂鍊欏垎灞侱ijkstra+heap錛岀敤鐨勫疄鐐瑰疄杈廣傘俆LE銆傘?

]]> - USACO 2008 OPEN Gold & EOJ 180---Cow Neighborhoods DPhttp://www.shnenglu.com/Uriel/articles/120479.htmlUrielUrielThu, 15 Jul 2010 13:10:00 GMThttp://www.shnenglu.com/Uriel/articles/120479.htmlhttp://www.shnenglu.com/Uriel/comments/120479.htmlhttp://www.shnenglu.com/Uriel/articles/120479.html#Feedback0http://www.shnenglu.com/Uriel/comments/commentRss/120479.htmlhttp://www.shnenglu.com/Uriel/services/trackbacks/120479.htmlhttp://blog.imzzl.com/2010/05/382.html
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浣嗘槸鏈夌偣闂錛?.涓斿氨瑕佹瘡嬈″彇瀛楀吀搴忔渶灝忕殑錛?.鏈鍚巌,j榪樿浜岄噸寰幆閬嶅巻鎵懼瓧鍏稿簭鏈灝忕殑
鏈彍ws鐨勪唬鐮佸涓嬶細(xì)
#include<math.h>
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#define INF 100000000
struct Cow


{
int x,y;
};
Cow p[100001];

int dx[4]=
{1,0,0,-1},dy[4]=
{0,1,-1,0};
int dp[65][65][35],path[4],n,m,k,map[3010][3010],tx,ty,g[65][65],nres,xx;

char pt[63][63][33][33],res[4][35],rres[35],tmp[35],dir[5][2]=
{"E","N","S","W"};
int main()


{
int i,j,t,w,h,x,tp,fx,fy;
scanf("%d %d %d",&n,&m,&k);
for(i=0;i<n;i++)scanf("%d %d",&p[i].x,&p[i].y);
for(i=0;i<m;i++)

{
scanf("%d %d",&tx,&ty);
map[tx][ty]=1;
}
for(i=0;i<=2*k;i++)
for(j=0;j<=2*k;j++)

{
for(t=0;t<=k;t++)dp[i][j][t]=-INF;
tp=0;
for(w=0;w<n;w++)
if(p[w].x+i-k>=0 && p[w].y+j-k>=0 && map[p[w].x+i-k][p[w].y+j-k])tp++;
g[i][j]=tp;
}
dp[k][k][0]=0;
for(h=1;h<=k;h++)
for(i=k-h;i<=k+h;i++)
for(j=k-h;j<=k+h;j++)

{
for(w=0;w<4;w++)
if(i>=dx[w] && j>=dy[w] && dp[i-dx[w]][j-dy[w]][h-1]>dp[i][j][h])dp[i][j][h]=dp[i-dx[w]][j-dy[w]][h-1];
x=0;
for(w=0;w<4;w++)
if(i>=dx[w] && j>=dy[w] && dp[i-dx[w]][j-dy[w]][h-1]==dp[i][j][h])path[x++]=w;
dp[i][j][h]+=g[i][j];
nres=0;
for(w=0;w<x;w++)

{
strcpy(res[w],pt[i-dx[path[w]]][j-dy[path[w]]][h-1]);
strcat(res[w],dir[path[w]]);
if(strcmp(res[nres],res[w])>0)nres=w;
}
strcpy(pt[i][j][h],res[nres]);
}
tp=0;
for(i=0;i<=2*k;i++)
for(j=0;j<=2*k;j++)
if(dp[i][j][k]>tp)tp=dp[i][j][k];
fx=-1;fy=-1;
for(i=0;i<=2*k;i++)
for(j=0;j<=2*k;j++)
if(dp[i][j][k]==tp)
if(fx<0)

{
fx=i;fy=j;
}
else if(strcmp(pt[fx][fy][k],pt[i][j][k])>0)

{
fx=i;fy=j;
}
printf("%d\n",tp);
puts(pt[fx][fy][k]);
return 0;
}


]]> - USACO 2008 OPEN Gold & EOJ 181---Cow Neighborhoods 騫舵煡闆?AVL鏍?/title>http://www.shnenglu.com/Uriel/articles/120476.htmlUrielUrielThu, 15 Jul 2010 13:02:00 GMThttp://www.shnenglu.com/Uriel/articles/120476.htmlhttp://www.shnenglu.com/Uriel/comments/120476.htmlhttp://www.shnenglu.com/Uriel/articles/120476.html#Feedback2http://www.shnenglu.com/Uriel/comments/commentRss/120476.htmlhttp://www.shnenglu.com/Uriel/services/trackbacks/120476.htmlhttp://www.cn210.com/onlinejudge/problemshow.php?pro_id=181
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鎴戠殑涓戦檵鐨勪唬鐮侊細(xì)
#include<set>
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<algorithm>
using namespace std;

struct point


{
int x,y,index;
friend bool operator<(const point &a,const point &b)

{
if(a.y==b.y)return a.x<b.x;
return a.y<b.y;
}
};

point p[100050];
int cnt[100050],n,c,father[100050];

set<point>SET;
set<point>::iterator it1,it2;

bool cmp(point a,point b)


{
return a.x<b.x;
}

int find(int x)


{
if(father[x]==x)return x;
else
return father[x]=find(father[x]);
}

void Union(int x,int y)


{
int fx=find(x),fy=find(y);
if(fx>fy)father[fx]=fy;
else
father[fy]=fx;
}

void Sov()


{
int i,j,maxx,h,zzl;
SET.insert(p[1]);
h=1;
for(i=2;i<=n;i++)

{
while((p[i].x-p[h].x)>c)

{
SET.erase(p[h]);
h++;
}
SET.insert(p[i]);
it1=it2=SET.find(p[i]);
it1--;
it2++;
if(it1!=SET.end() && abs((it1)->y-p[i].y)<=c)

{
Union(i,it1->index);
}
if(it2!=SET.end() && abs((it2)->y-p[i].y)<=c)

{
Union(it2->index,i);
}
}
zzl=0;
for(i=1;i<=n;i++)

{
if(father[i]==i)zzl++;
cnt[find(i)]++;
}
maxx=0;
for(i=1;i<=n;i++)

{
if(cnt[i]>maxx)maxx=cnt[i];
}
printf("%d %d\n",zzl,maxx);
return ;
}

int main()


{
int i,x,y;
scanf("%d %d",&n,&c);
for(i=1;i<=n;i++)

{
scanf("%d %d",&x,&y);
p[i].x=x+y;p[i].y=x-y;
father[i]=i;
cnt[i]=0;
}
sort(p+1,p+n+1,cmp);
for(i=1;i<=n;i++)p[i].index=i;
Sov();
return 0;
}

]]>
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