囧，一開始沒有管人的情況，只看箱子，果然SB了。

#include <cstdio> #include <cstring> #include <iostream> #include <map> #include <set> #include <vector> #include <string> #include <queue> #include <deque> #include <bitset> #include <list> #include <cstdlib> #include <climits> #include <cmath> #include <ctime> #include <algorithm> #include <stack> #include <sstream> #include <numeric> #include <fstream> #include <functional>using namespace std;#define MP make_pair #define PB push_back typedef long long LL; typedef unsigned long long ULL; typedef vector<int> VI; typedef pair<int,int> pii; const int INF = INT_MAX / 3; const double eps = 1e-8; const LL LINF = 1e17; const double DINF = 1e60; const int maxn = 10; const int dx[] = {-1,1,0,0}; const int dy[] = {0,0,-1,1};struct Node {int x,y,pre;Node(int x,int y,int pre = -1): x(x), y(y), pre(pre) {} };int n,m,mp[maxn][maxn],sx,sy,ex,ey,tmp[maxn][maxn]; int dist[maxn][maxn][4],px,py; bool vis[maxn][maxn];bool bfs1(int x1,int y1,int x2,int y2) {if(tmp[x1][y1] != 0 || tmp[x2][y2] != 0) return false;queue<int> qx,qy;qx.push(x1); qy.push(y1);memset(vis,0,sizeof(vis));vis[x1][y1] = true;while(!qx.empty()) {int x = qx.front(), y = qy.front();qx.pop(); qy.pop();if(x == x2 && y == y2) return true;for(int i = 0;i < 4;i++) {int nx = x + dx[i], ny = y + dy[i];if(!vis[nx][ny] && tmp[nx][ny] == 0) {qx.push(nx); qy.push(ny); vis[nx][ny] = true;}}}return false; }int bfs() {queue<Node> box,man;box.push(Node(sx,sy,0));man.push(Node(px,py));for(int i = 0;i < 4;i++) dist[sx][sy][i] = -1;int x,y,nx,ny,xp,yp,nxp,nyp,pre;while(!box.empty()) {Node nowbox = box.front(), nowman = man.front();box.pop(); man.pop();x = nowbox.x; y = nowbox.y; pre = nowbox.pre;xp = nowman.x; yp = nowman.y;//printf("box: %d %d man: %d %d time: %d\n",x,y,xp,yp,dist[x][y][pre]);if(x == ex && y == ey) return dist[x][y][pre] + 1;for(int i = 0;i < 4;i++) {nx = x + dx[i]; ny = y + dy[i];nxp = x - dx[i]; nyp = y - dy[i];tmp[x][y] = 1;if((dist[nx][ny][i] == -1 || dist[nx][ny][i] >= dist[x][y][pre] + 1) && tmp[nx][ny] == 0&& bfs1(xp,yp,nxp,nyp)) {dist[nx][ny][i] = dist[x][y][pre] + 1;box.push(Node(nx,ny,i)); man.push(Node(x,y));}tmp[x][y] = 0;}}return -1; }int main() {int T; scanf("%d",&T);while(T--) {scanf("%d%d",&n,&m);memset(dist,-1,sizeof(dist));memset(tmp,0x3f,sizeof(tmp));for(int i = 1;i <= n;i++) {for(int j = 1;j <= m;j++) {scanf("%d",&tmp[i][j]);if(tmp[i][j] == 2) {sx = i; sy = j;}if(tmp[i][j] == 3) {ex = i; ey = j;}if(tmp[i][j] == 4) {px = i; py = j;}if(tmp[i][j] != 1) tmp[i][j] = 0;}}printf("%d\n",bfs());}return 0; }

　　

轉載于:https://www.cnblogs.com/rolight/p/3936968.html

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