搜索专题 BFS A1091.Acute Stroke(30)

#pragma warning(disable:4996)
#include <stdio.h>
#include <stdlib.h>
#include <queue>
using namespace std;
struct node{
    int x, y, z;
}p;
int m, n, l, t, volume = 0;
int brain[1300][130][61], bbrain[1300][130][61];
//右，左，上，下，前，后
int X[] = { 0, 0, 0, 0, 1, -1 };
int Y[] = { 1, -1, 0, 0, 0, 0 };
int Z[] = { 0, 0, 1, -1, 0, 0 };
bool judge(int x, int y, int z){
    if (x >= m || x < 0 || y >= n || y < 0 || z >= l || z < 0)    return false;
    if (!brain[x][y][z] || bbrain[x][y][z])    return false;
    return true;
}
int BFS(int x, int y, int z){
    int cnt = 0;
    queue<node> qn;
    p.x = x;
    p.y = y;
    p.z = z;
    qn.push(p);
    bbrain[x][y][z] = 1;
    while (!qn.empty()){
        node top = qn.front();
        qn.pop();
        cnt++;
        for (int i = 0; i < 6; i++){
            int nx = top.x + X[i], ny = top.y + Y[i], nz = top.z + Z[i];
            if (judge(nx, ny, nz)){
                p.x = nx;
                p.y = ny;
                p.z = nz;
                qn.push(p);
                bbrain[nx][ny][nz] = 1;
            }
        }
    }
    if (cnt >= t)    return cnt;
    else return 0;
}
int main(){
    scanf("%d %d %d %d", &m, &n, &l, &t);
    for (int k = 0; k < l; k++)
        for (int i = 0; i < m; i++)
            for (int j = 0; j < n; j++)
                scanf("%d", &brain[i][j][k]);
    for (int i = 0; i < m; i++)
        for (int j = 0; j < n; j++)
            for (int k = 0; k < l; k++)
                if (brain[i][j][k] && bbrain[i][j][k] == 0)
                    volume += BFS(i, j, k);
    printf("%d\n", volume);
    system("pause");
    return 0;

}

参考：https://blog.csdn.net/ztmajor/article/details/81393476