OJ-Problems-Source/HDOJ/1350_autoAC.cpp

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2016-08-13 23:51:27 +08:00
#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
using namespace std;
#define maxn 505
struct Elem
{
int x1, y1, x2, y2;
int s, e;
} ride[maxn];
int n;
int uN, vN;
bool g[maxn][maxn];
int xM[maxn], yM[maxn];
bool chk[maxn];
int cal(int h, int m)
{
return h * 60 + m;
}
int dist(int x1, int y1, int x2, int y2)
{
return abs(x1 - x2) + abs(y1 - y2);
}
void input()
{
scanf("%d", &n);
for (int i = 0; i < n; i++)
{
int h, m;
scanf("%d:%d", &h, &m);
ride[i].s = cal(h, m);
scanf("%d%d%d%d", &ride[i].x1, &ride[i].y1, &ride[i].x2, &ride[i].y2);
ride[i].e = ride[i].s + dist(ride[i].x1, ride[i].y1, ride[i].x2, ride[i].y2);
}
}
bool ok(Elem &a, Elem &b)
{
return dist(a.x2, a.y2, b.x1, b.y1) + a.e < b.s;
}
void make()
{
for (int i = 0; i < n; i++)
for (int j = 0; j < n; j++)
g[i][j] = ok(ride[i], ride[j]);
}
bool SearchPath(int u)
{
int v;
for (v = 0; v < vN; v++)
if (g[u][v] && !chk[v])
{
chk[v] = true;
if (yM[v] == -1 || SearchPath(yM[v]))
{
yM[v] = u;
xM[u] = v;
return true;
}
}
return false;
}
int MaxMatch()
{
int u, ret = 0;
memset(xM, -1, sizeof(xM));
memset(yM, -1, sizeof(yM));
for (u = 0; u < uN; u++)
if (xM[u] == -1)
{
memset(chk, false, sizeof(chk));
if (SearchPath(u))
ret++;
}
return ret;
}
int main()
{
int t;
scanf("%d", &t);
while (t--)
{
input();
make();
uN = vN = n;
printf("%d\n", n - MaxMatch());
}
return 0;
}