#include <vector> using namespace std; /*保证不往回走 dir 4 2 0 3 1 */ //route 存储走过的路径 int next_step(vector<vector<int>> &map, vector<pair<int,int>> route, int x, int y, int dir) { //cout<<y<<x<<" "<<map[y][x]<<endl; if(x+1 ...