很无语的一道题。。但现在想想也就那样,题很简单,你说出题人坑,那还是你自己没有考虑完全,再坑总会有人一遍过的。
#include <iostream>
#include <cstdio>
#include <queue>
#include <string.h>
using namespace std;
const int AX = 55;
int mp[AX][AX][AX];
int A,B,C,t;
int vis[AX][AX][AX];
int dir[6][3]={{1,0,0},{0,1,0},{0,0,1},{-1,0,0},{0,-1,0},{0,0,-1}};
struct Node
{
int x,y,z;
int step;
}pos,q,p;
int bfs(){
if(A-1 == 0 && B-1 ==0 && C-1 == 0) return 0;
queue<Node>que;
pos.x = 0 ; pos.y = 0 ; pos.z = 0;
pos.step = 0 ;
vis[0][0][0] = 1;
que.push(pos);
while( !que.empty() ){
q = que.front();
que.pop();
for( int i = 0 ; i < 6; i ++ ){
int xx = q.x + dir[i][0];
int yy = q.y + dir[i][1];
int zz = q.z + dir[i][2];
if( xx >= 0 && xx <= A-1 && yy >=0 && yy <= B-1 && zz >=0 && zz <= C-1 && q.step+1 <=t && mp[xx][yy][zz] == 0 && !vis[xx][yy][zz] ){
if( xx == A-1 && yy == B-1 && zz == C-1 ) return q.step + 1;
p.x = xx; p.y = yy ; p.z = zz; p.step = q.step + 1;
que.push(p);
vis[xx][yy][zz] = 1;
}
}
}
return -1;
}
int main(){
int T;
scanf("%d",&T);
while( T-- ){
memset(vis,0,sizeof(vis));
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++ ){
scanf("%d",&mp[i][j][k]);
}
}
}
int ans = bfs();
if( ans >= 0 ) printf("%d\n",ans);
else printf("-1\n");
}
return 0;
}