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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
鏆戝亣闆嗚絎簩鍦哄掓暟絎簩棰橈紝姣旇禌鐨勬椂鍊欏彧鏈塂Y錛孡P錛孼MJ錛宧qch鍥涗綅澶х墰鍑轟簡銆傘?br> 鍚?h鍩烘湰閮藉湪綰犵粨榪欓錛屾渶鍚庝互WA緇撴潫錛屽洜涓烘病鐪嬪埌璺緞涓嶅敮涓鏃惰杈撳嚭瀛楀吀搴忔渶灝忕殑銆傘? =銆傘備笉榪囪禌鍚庣煡閬撹繖閲岄敊浜嗕箣鍚庤繕鏄籂緇撲簡澶у崐澶┿傘?br> 鎬濊礬閮ㄥ垎鍙傝冧簡榪欓噷錛?a >http://blog.imzzl.com/2010/05/382.html
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
#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
#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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