OJ-Problems-Source/HDOJ/3081_autoAC.cpp
2016-08-30 22:34:56 +08:00

162 lines
2.9 KiB
C++

#include <iostream>
#include <algorithm>
using namespace std;
int mp[210][210];
int m[210][210];
int set[410];
int N, M, f, sum, ans;
const int inf = 0x7f7f7f7f;
bool Find;
int vh[410];
int h[410];
int find( int x)
{
return x == set[x] ? x : set[x] = find( set[x] );
}
void init_flow( )
{
memset(h, 0, sizeof(h));
memset(vh, 0, sizeof(vh));
}
void init( )
{
for( int i = 0; i < 110; i++)
set[i] = i;
memset(mp, 0, sizeof(mp));
memset(m, 0, sizeof(m));
}
//婧0锛姹N + 1
void make_graph(int mid)
{
//婧瑰板濂崇
memset(mp, 0, sizeof(mp));
for( int i = 1; i <= N; i++)
{
mp[0][i] = mid;
}
//风版
for( int i = N + 1; i <= 2 * N; i++)
{
mp[i][2 * N + 1] = mid;
}
for( int i = 1; i <= 2 * N; i++)
for( int j = 1; j <= 2 * N; j++)
mp[i][j] = m[i][j];
//崇郴浠ヤ
for( int i = 1; i <= 2 * N; i++)
{
for( int j = 1; j <= 2 * N; j++)
{
if( set[i] == set[j])
{
for( int k = 1; k <= 2 * N; k++)
{
if ( mp[j][k] && k != i)
mp[i][k] = 1;
}
}
}
}
}
void dfs( int x )
{
int hmin = 2 * N + 1, i;
if( x == 2 * N + 1)
{
sum += ans;
Find = true;
return;
}
for( i = 0; i <= 2 * N + 1; i++)
{
if( mp[x][i] > 0)
{
if( h[x] == h[i] + 1 )
{
if( mp[x][i] < ans )
ans = mp[x][i];
dfs( i );
if( Find )
break;
if( h[0] >= 2 * N + 1 )
return;
}
if( h[i] < hmin )
hmin = h[i];
}
}
if( Find )
{
mp[x][i] -= ans;
mp[i][x] += ans;
}
else
{
vh[h[x]]--;
if( vh[h[x]] == 0 )
h[0] = 2 * N + 1;
h[x] = hmin + 1;
vh[h[x]]++;
}
}
int sap( )
{
sum = 0;
init_flow( );
vh[0] = 2 * N + 2;
while( h[0] < 2 * N + 2 )
{
ans = inf;
Find = false;
dfs( 0 );
}
return sum;
}
int solve( )
{
int l = 0, r = N, temp = 0;
while( l <= r )
{
int mid = (l + r) / 2;
make_graph(mid);
if( sap( ) == mid * N )
{
temp = mid;
l = mid + 1;
}
else
r = mid - 1;
}
return temp;
}
int main( )
{
int T, a, b;
cin>>T;
while( T-- )
{
cin>>N>>M>>f;
init( );
for( int i = 1; i <= M; i++)
{
cin>>a>>b;
mp[a][b + N] = 1;
m[a][b + N] = 1;
}
for( int i = 1; i <= f; i++)
{
cin>>a>>b;
int x = find( a );
int y = find( b );
if( x != y )
set[x] = y;
}
for( int i = 1; i <= N; i++)
{
set[i] = find( i );
}
printf("%d\n", solve( ));
}
return 0;
}