杭電1253--勝利的大逃亡(Bfs)

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題目:http://acm.hdu.edu.cn/showproblem.php?pid=1253

題意: 迷宮問題,  三維數組, 資料範圍較大, Bfs較優。  PS-----> 墮落了幾天, 是時候奮鬥了,fighting!! 

//ac碼:1669ms;#include <queue>#include <cstdio>#include <cstring>#include <iostream>using namespace std;int map[55][55][55]; int ac[6][3] = {0, 0, 1, 0, 0, -1, 0, 1, 0, 0, -1, 0, 1, 0, 0, -1, 0, 0};struct Maze{    int x, y, z, step;}r, s, t;int a, b, c, T;int Bfs(int x, int y, int z){    queue<Maze> Q;    r.x = x; r.y = y; r.z = z; r.step = 0;    Q.push(r);    map[x][y][z] = 1;    while(!Q.empty())    {        s = Q.front(); Q.pop();        for(int i = 0; i < 6; i++)        {             t.x = s.x + ac[i][0];             t.y = s.y + ac[i][1];            t.z = s.z + ac[i][2];            t.step = s.step + 1;            if(t.x >= 0 && t.x < a && t.y >= 0 && t.y < b && t.z >= 0 && t.z < c && map[t.x][t.y][t.z] == 0)            {                if(t.x == a - 1 && t.y == b - 1 && t.z == c - 1 && t.step <= T)                                return t.step;                else                {                    map[t.x][t.y][t.z] = 1;                    Q.push(t);                }            }         }    }     return -1;} int main(){    int k;    scanf("%d", &k);    while(k--)    {        scanf("%d %d %d %d", &a, &b, &c, &T);        for(int i = 0; i < a; i++)            for(int j = 0; j < b; j++)                for(int k = 0; k < c; k++)                    //cin >> map[i][j][k];                    scanf("%d", &map[i][j][k]);        int ans = Bfs(0, 0, 0);         printf("%d\n", ans);    }    return 0;}

 

杭電1253--勝利的大逃亡(Bfs)

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