OJ-Problems-Source/HDOJ/2771_autoAC.cpp

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#include <cstdio>
#include <cstring>
#include <queue>
#include <algorithm>
using namespace std;
const int maxn = 50 + 5;
const int maxc = 1000 + 1;
int n;
int x0[maxn], y0[maxn], z0[maxn], x1[maxn], y1[maxn], z1[maxn];
int xs[maxn*2], ys[maxn*2], zs[maxn*2], nx, ny, nz;
int color[maxn*2][maxn*2][maxn*2];
int dx[] = {0, 0, 0, 0, -1, 1};
int dy[] = {0, 0, -1, 1, 0, 0};
int dz[] = {-1, 1, 0, 0, 0, 0};
struct Cell
{
int x, y, z;
Cell(int x = 0, int y = 0, int z = 0) : x(x), y(y), z(z) {}
void setVis() const {
color[x][y][z] = 2;
}
int volume() const {
return (xs[x+1]-xs[x])*(ys[y+1]-ys[y])*(zs[z+1]-zs[z]);
}
Cell neighbor(int i) const {
return Cell(x+dx[i], y+dy[i], z+dz[i]);
}
bool valid() const {
return x>=0 && x<nx-1 && y>=0 && y<ny-1 && z>=0 && z<nz-1;
}
bool solid() const {
return color[x][y][z] == 1;
}
int area(int i) const {
if (dx[i] != 0) return (ys[y+1]-ys[y])*(zs[z+1]-zs[z]);
else if(dy[i] != 0) return (xs[x+1]-xs[x])*(zs[z+1]-zs[z]);
else return (xs[x+1]-xs[x])*(ys[y+1]-ys[y]);
}
bool getVis() const {
return color[x][y][z] == 2;
}
};
void discretize(int* x, int& n)
{
sort(x, x + n);
n = (int)(unique(x, x+n) - x);
}
int ID(int* x, int n, int x0)
{
return (int)(lower_bound(x, x+n, x0) - x);
}
void floodfill(int& s, int& v)
{
s = v = 0;
Cell c; c.setVis();
queue<Cell> Q; Q.push(c);
while (!Q.empty())
{
Cell now = Q.front(); Q.pop();
v += now.volume();
for (int i = 0; i < 6; i++)
{
Cell nxt = now.neighbor(i);
if (!nxt.valid()) continue;
if (nxt.solid()) s += now.area(i);
else if(!nxt.getVis())
{
nxt.setVis();
Q.push(nxt);
}
}
}
v = maxc*maxc*maxc - v;
}
int main()
{
int t; scanf("%d", &t);
while (t--)
{
scanf("%d", &n);
nx = ny = nz = 2;
xs[0] = ys[0] = zs[0] = 0;
xs[1] = ys[1] = zs[1] = maxc;
for (int i = 0; i < n; i++)
{
scanf("%d%d%d", &x0[i], &y0[i], &z0[i]);
scanf("%d%d%d", &x1[i], &y1[i], &z1[i]);
x1[i] += x0[i], y1[i] += y0[i], z1[i] += z0[i];
xs[nx++] = x0[i], xs[nx++] = x1[i];
ys[ny++] = y0[i], ys[ny++] = y1[i];
zs[nz++] = z0[i], zs[nz++] = z1[i];
}
discretize(xs, nx), discretize(ys, ny), discretize(zs, nz);
memset(color, 0, sizeof(color));
for (int i = 0; i < n; i++)
{
int X1 = ID(xs, nx, x0[i]), X2 = ID(xs, nx, x1[i]);
int Y1 = ID(ys, ny, y0[i]), Y2 = ID(ys, ny, y1[i]);
int Z1 = ID(zs, nz, z0[i]), Z2 = ID(zs, nz, z1[i]);
for (int X = X1; X < X2; X++)
{
for (int Y = Y1; Y < Y2; Y++)
{
for (int Z = Z1; Z < Z2; Z++)
{
color[X][Y][Z] = 1;
}
}
}
}
int s, v;
floodfill(s, v);
printf("%d %d\n", s, v);
}
return 0;
}