OJ-Problems-Source/HDOJ/3718_autoAC.cpp

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#include <iostream>
#include <stdio.h>
#include <string.h>
#include <algorithm>
#define size 10001
#define _clr(x) memset(x,0xff,sizeof(int)*26)
#define inf 1000000000
using namespace std;
int g[26][26];
bool l[26][size];
int KM(int n);
bool HaveLetter[26];
struct loc
{
int a[size];
int len;
loc(){len = 0;}
void add(int val)
{
a[len++] = val;
}
}locate1[26],locate2[26],rem2,rem1;
void InitGraph(int n)
{
int i,j,A;
memset(HaveLetter,0,sizeof(HaveLetter));
for(i=0;i<26;i++)
locate2[i].len = 0;
for (i=0;i<n;i++)
{
for (j=0;j<n;j++)
{
g[i][j] = 0;
}
}
for (i=0;i<rem2.len;i++)
{
A = rem2.a[i];
memset(l[A],0,sizeof(l[A]));
}
}
void GreateGraph()
{
int i,j,k,A,B,locate;
int count[26];
for (i=0;i<rem1.len;i++)
{
A = rem1.a[i];
memset(count,0,sizeof(count));
for (j=0;j<locate1[A].len;j++)
{
locate = locate1[A].a[j];
for (k=0;k<rem2.len;k++)
{
B = rem2.a[k];
if(l[B][locate])
{
count[B]++;
g[i][k] = count[B];
}
}
}
}
}
int main()
{
int T,n,k,m,i,letter;
char ch[2];
scanf("%d",&T);
while (T--)
{
scanf("%d%d%d",&n,&k,&m);
memset(HaveLetter,0,sizeof(HaveLetter));
rem1.len = 0;
for(i=0;i<26;i++)
locate1[i].len = 0;
for(i=0;i<n;i++)
{
scanf("%s",ch);
letter = ch[0]-'A';
if(!HaveLetter[letter])
rem1.add(letter),HaveLetter[letter] = 1;
locate1[letter].add(i);
}
sort(rem1.a,rem1.a+rem1.len);
while (m--)
{
InitGraph(k);
rem2.len=0;
for (i=0;i<n;i++)
{
scanf("%s",ch);
letter = ch[0]-'A';
if(!HaveLetter[letter])
rem2.add(letter),HaveLetter[letter] = 1;
locate2[letter].add(i);
l[letter][i] = 1;
}
sort(rem2.a,rem2.a+rem2.len);
GreateGraph();
printf("%.4lf\n",KM(k)*1.0/n);
}
}
return 0;
}
int KM(int n)
{
int s[26],t[26],l1[26],l2[26],p,q,ret=0,i,j,k;
int match1[26],match2[26];
for (i=0;i<n;i++)
for (l1[i]=-inf,j=0;j<n;j++)
l1[i]=g[i][j]>l1[i]?g[i][j]:l1[i];
for (i=0;i<n;l2[i++]=0);
for (_clr(match1),_clr(match2),i=0;i<n;i++)
{
for (_clr(t),s[p=q=0]=i;p<=q&&match1[i]<0;p++)
for (k=s[p],j=0;j<n&&match1[i]<0;j++)
if (l1[k]+l2[j]==g[k][j]&&t[j]<0)
{
s[++q]=match2[j],t[j]=k;
if (s[q]<0)
for (p=j;p>=0;j=p)
match2[j]=k=t[j],p=match1[k],match1[k]=j;
}
if (match1[i]<0)
{
for (i--,p=inf,k=0;k<=q;k++)
for (j=0;j<n;j++)
if (t[j]<0&&l1[s[k]]+l2[j]-g[s[k]][j]<p)
p=l1[s[k]]+l2[j]-g[s[k]][j];
for (j=0;j<n;l2[j]+=t[j]<0?0:p,j++);
for (k=0;k<=q;l1[s[k++]]-=p);
}
}
for (i=0;i<n;i++)
ret+=g[i][match1[i]];
return ret;
}