mirror of
https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
104 lines
2.4 KiB
C++
104 lines
2.4 KiB
C++
#include<stdio.h>
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#include<string.h>
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#include<algorithm>
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using namespace std;
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#define clr(x)memset(x,0,sizeof(x))
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#define min(a,b)(a)<(b)?(a):(b)
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#define INF 0x1f1f1f1f
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#define N 21
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struct node
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{
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int x,y;
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}p[N],be;
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int dis(node a,node b)
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{
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return (a.x-b.x)*(a.x-b.x)+(a.y-b.y)*(a.y-b.y);
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}
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int g[N][N];
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int dp[1<<N];
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int pre[1<<N];
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struct ans
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{
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int fi,se,num;
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}res[N];
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bool cmp(ans a,ans b)
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{
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return a.fi<b.fi;
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}
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int main()
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{
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int ca=1,n,i,j,k,t;
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scanf("%d",&t);
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while(t--)
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{
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scanf("%d %d",&be.x,&be.y);
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scanf("%d",&n);
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p[n]=be;
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for(i=0;i<n;i++)
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scanf("%d%d",&p[i].x,&p[i].y);
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memset(dp,INF,sizeof(dp));
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pre[0]=0;
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int st=1<<n;
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dp[0]=0;
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for(i=0;i<=n;i++)
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for(j=0;j<=n;j++)
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g[i][j]=dis(p[i],p[j]);
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printf("Case %d:\n",ca++);
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int stat,tmp,ss;
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for(i=0;i<st;i++)
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{
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for(j=0;j<n;j++)
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{
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if((1<<j)&i)
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continue;
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stat=i|(1<<j);
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tmp=dp[i]+g[n][j]*2;
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if(tmp<dp[stat])
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{
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dp[stat]=tmp;
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pre[stat]=i;
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}
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for(k=j+1;k<n;k++)
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{
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if((1<<k)&i)
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continue;
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ss=stat|(1<<k);
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tmp=dp[i]+g[n][j]+g[j][k]+g[n][k];
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if(tmp<dp[ss])
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{
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dp[ss]=tmp;
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pre[ss]=i;
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}
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}
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}
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}
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st-=1;
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printf("%d\n",dp[st]);
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int top=0;
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while(st)
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{
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stat=pre[st]^st;
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st=pre[st];
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res[top].num=0;
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for(i=0;i<n;i++)
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if((1<<i)&stat)
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{
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res[top].num++;
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if(res[top].num==1)
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res[top].fi=i+1;
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else res[top].se=i+1;
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}
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top++;
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}
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sort(res,res+top,cmp);
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for(i=0;i<top;i++)
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{
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if(res[i].num==1)
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printf("%d%c",res[i].fi,i==top-1?'\n':' ');
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else
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printf("%d %d%c",res[i].fi,res[i].se,i==top-1?'\n':' ');
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}
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}
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return 0;
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}
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