标签:bfs
题目已经说了有唯一的解,所以只需要在找的过程中保存当前这个点前面的那个的点在队列中的位置
然后再输出的时候运用递归输出就可以了。
| Time Limit: 1000MS | Memory Limit: 65536K | |
| Total Submissions: 8238 | Accepted: 4848 | 
Description
int maze[5][5] = {
	0, 1, 0, 0, 0,
	0, 1, 0, 1, 0,
	0, 0, 0, 0, 0,
	0, 1, 1, 1, 0,
	0, 0, 0, 1, 0,
};
Input
Output
Sample Input
0 1 0 0 0 0 1 0 1 0 0 0 0 0 0 0 1 1 1 0 0 0 0 1 0
Sample Output
(0, 0) (1, 0) (2, 0) (2, 1) (2, 2) (2, 3) (2, 4) (3, 4) (4, 4)
#include <stdio.h>
#include <stdlib.h>
#include <malloc.h>
#include <limits.h>
#include <ctype.h>
#include <string.h>
#include <string>
#include <queue>
#include <math.h>
#include <algorithm>
#include <iostream>
#include <stack>
#include <deque>
#include <vector>
#include <set>
using namespace std;
#define MAXN 10
int xx[4]={-1,0,1,0};
int yy[4]={0,1,0,-1};
int vis[MAXN][MAXN];
int map[MAXN][MAXN];
int ans;
struct node{
    int x,y;
    int pre;
}q[111];
int start=0;
int end = 1;
void print(int x){
    if(q[x].pre != -1){
        print(q[x].pre);
        printf("(%d, %d)\n",q[x].x,q[x].y);
    }
}
void BFS(int x,int y){
    int i;
    vis[x][y] = 1;
    q[start].x = x;
    q[start].y = y;
    q[start].pre = -1;
    while(start < end){
        if(q[start].x==4 && q[start].y==4){
            print(start);
        }
        for(i=0;i<4;i++){
            int dx = xx[i] + q[start].x;
            int dy = yy[i] + q[start].y;
            if(dx>=0 && dx<5 && dy>=0 && dy<5 && vis[dx][dy]==0 && map[dx][dy]==0){
                q[end].x = dx;
                q[end].y = dy;
                vis[dx][dy] = 1;
                q[end].pre = start;
                end++;
            }
            //if(dx==4 && dy==4){
            //    print(start);
            //}
        }
        start++;
    }
}
int main(){
    int i,j;
    for(i=0;i<5;i++){
        for(j=0;j<5;j++){
            cin>>map[i][j];
        }
    }
    memset(vis,0,sizeof(vis));
    printf("(0, 0)\n");
    BFS(0,0);
    //printf("(4, 4)\n");
    return 0;
}
标签:bfs
原文地址:http://blog.csdn.net/zcr_7/article/details/41288779