View Compilation Error

0_0_21490559_6332.cpp: In function 'int main()':
0_0_21490559_6332.cpp:62:9: error: 'v' was not declared in this scope
     num[v[y][j ^ 1]]--;
         ^
0_0_21490559_6332.cpp:86:14: error: 'v' was not declared in this scope
      if (vis[v[x][j] + n] == 1)//鍓峮涓�宸︿晶缁撶�?鍚巒涓�鍙充晶缁撶�?
              ^
0_0_21490559_6332.cpp:90:10: error: 'v' was not declared in this scope
      vis[v[x][j] + n] = 1;
          ^
0_0_21490559_6332.cpp:94:19: error: 'e' was not declared in this scope
      for (auto &y:e[x])
                   ^
0_0_21490559_6332.cpp:112:19: error: 'e' was not declared in this scope
       for(auto &y:e[x])
                   ^