class Address{

private String addressName;

private boolean isReached = false;

private Address east;

private Address west;

private Address north;

private Address south;

public Address(String addressName) {

this.addressName = addressName;

}

}

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

String[] arr = sc.nextLine().split(",");

高老庄 main = new 高老庄();

main.generateMap();

main.findPath(arr[0], arr[1]);

main.printPath();

}

private void printPath() {

for(int i=1; i

Address cur = res.get(i);

Address pre = res.get(i-1);

if(pre.north == cur) System.out.print("north");

else if(pre.south == cur) System.out.print("south");

else if(pre.west == cur) System.out.print("west");

else if(pre.east == cur) System.out.print("east");

if(i != res.size()-1) System.out.print(",");

}

}

public void findPath(String wukong, String bajie) {

Address start = map.get(wukong);

Address end = map.get(bajie);

ArrayList

if(start == end) {

if(res == null || path.size()

res = new ArrayList(path);

}

return;

}

int isEnd = 0;

if(start.north != null && !start.north.isReached) {

path.add(start.north);

start.north.isReached = true;

dfs(start.north, end, path);

path.remove(path.size()-1);

start.north.isReached = false;

}

if(start.south != null && !start.south.isReached) {

start.south.isReached = true;

path.add(start.south);

dfs(start.south, end, path);

path.remove(path.size()-1);

start.south.isReached = false;

}

if(start.west != null && !start.west.isReached) {

start.west.isReached = true;

path.add(start.west);

dfs(start.west, end, path);

path.remove(path.size()-1);

start.west.isReached = false;

}

if(start.east != null && !start.east.isReached) {

start.east.isReached = true;

path.add(start.east);

dfs(start.east, end, path);

path.remove(path.size()-1);

start.east.isReached = false;

}

}

public void generateMap() {

Address DAOTIAN1 = new Address("DAOTIAN1");

Address TULU1 = new Address("TULU1");

Address DAOTIAN = new Address("DAOTIAN");

Address TULU = new Address("TULU");

Address CUNKOU = new Address("CUNKOU");

Address NONGSHE = new Address("NONGSHE");

Address TULU2 = new Address("TULU2");

Address JIEDAO = new Address("JIEDAO");

Address TIEPU = new Address("TIEPU");

Address LIUJIABUDIAN = new Address("LIUJIABUDIAN");

Address JIEDAO1 = new Address("JIEDAO1");

Address XIAOJIUGUAN = new Address("XIAOJIUGUAN");

Address ZHANGFANG = new Address("ZHANGFANG");

Address PIANTING = new Address("PIANTING");

Address GUIGE = new Address("GUIGE");

Address YASHI = new Address("YASHI");

Address HUAYUAN = new Address("HUAYUAN");

Address HOUYUAN = new Address("HOUYUAN");

Address ZHENGTING = new Address("ZHENGTING");

Address ZHENGYUAN = new Address("ZHENGYUAN");

Address GAOJIADAYUAN = new Address("GAOJIADAYUAN");

Address JIEDAO2 = new Address("JIEDAO2");

Address PIANFANG = new Address("PIANFANG");

Address FANTING = new Address("FANTING");

Address XIYIFANG = new Address("XIYIFANG");

Address TULU3 = new Address("TULU3");

Address QINGSHILU = new Address("QINGSHILU");

DAOTIAN1.south = TULU1;

TULU1.north = DAOTIAN1;

TULU1.south = DAOTIAN;

DAOTIAN.north = TULU1;

DAOTIAN.south = TULU;

TULU.north = DAOTIAN;

TULU.south = CUNKOU;

CUNKOU.north = TULU;

CUNKOU.east = NONGSHE;

NONGSHE.west = CUNKOU;

TULU1.east = TULU2;

TULU2.west = TULU1;

TULU2.east = JIEDAO;

JIEDAO.west = TULU2;

LIUJIABUDIAN.south = JIEDAO;

JIEDAO.north = LIUJIABUDIAN;

JIEDAO.south = TIEPU;

TIEPU.north = JIEDAO;

JIEDAO.east = JIEDAO1;

JIEDAO1.west = JIEDAO;

JIEDAO1.south = XIAOJIUGUAN;

XIAOJIUGUAN.north = JIEDAO1;

YASHI.south = GUIGE;

GUIGE.north = YASHI;

GUIGE.east = HOUYUAN;

HOUYUAN.west = GUIGE;

PIANTING.east = ZHENGTING;

ZHENGTING.west = PIANTING;

ZHANGFANG.east = ZHENGYUAN;

ZHENGYUAN.west = ZHANGFANG;

JIEDAO1.east = GAOJIADAYUAN;

GAOJIADAYUAN.west = JIEDAO1;

HUAYUAN.south = HOUYUAN;

HOUYUAN.north = HUAYUAN;

HOUYUAN.south = ZHENGTING;

ZHENGTING.north = HOUYUAN;

ZHENGYUAN.north = ZHENGTING;

ZHENGTING.south = ZHENGYUAN;

ZHENGYUAN.south = GAOJIADAYUAN;

GAOJIADAYUAN.north = ZHENGYUAN;

HOUYUAN.east = XIYIFANG;

XIYIFANG.west = HOUYUAN;

ZHENGTING.east = FANTING;

FANTING.west = ZHENGTING;

ZHENGYUAN.east = PIANFANG;

PIANFANG.west = ZHENGYUAN;

GAOJIADAYUAN.east = JIEDAO2;

JIEDAO2.west = GAOJIADAYUAN;

JIEDAO2.east = TULU3;

TULU3.west = JIEDAO2;

TULU3.east = QINGSHILU;

QINGSHILU.west = TULU3;

map.put("DAOTIAN1", DAOTIAN1);

map.put("TULU1", TULU1);

map.put("DAOTIAN", DAOTIAN);

map.put("TULU", TULU);

map.put("CUNKOU", CUNKOU);

map.put("NONGSHE", NONGSHE);

map.put("TULU2", TULU2);

map.put("LIUJIABUDIAN", LIUJIABUDIAN);

map.put("JIEDAO", JIEDAO);

map.put("TIEPU", TIEPU);

map.put("YASHI", YASHI);

map.put("GUIGE", GUIGE);

map.put("PIANTING", PIANTING);

map.put("ZHANGFANG", ZHANGFANG);

map.put("JIEDAO1", JIEDAO1);

map.put("XIAOJIUGUAN", XIAOJIUGUAN);

map.put("HUAYUAN", HUAYUAN);

map.put("HOUYUAN", HOUYUAN);

map.put("ZHENGTING", ZHENGTING);

map.put("ZHENGYUAN", ZHENGYUAN);

map.put("GAOJIADAYUAN", GAOJIADAYUAN);

map.put("XIYIFANG", XIYIFANG);

map.put("FANTING", FANTING);

map.put("PIANFANG", PIANFANG);

map.put("JIEDAO2", JIEDAO2);

map.put("TULU3", TULU3);

map.put("QINGSHILU", QINGSHILU);

}

}

第三题 简单的DFS吧，但是我觉得应该有更好的方法，DFS还是有点太蠢了