View Compilation Error

0_0_15925397_15461.cpp: In function 'int bfs(node1)':
0_0_15925397_15461.cpp:69:8: error: 'std::next' does not have class type
    vis[next.x][next.y][next.xx][next.yy]=1;
        ^
0_0_15925397_15461.cpp:69:16: error: 'std::next' does not have class type
    vis[next.x][next.y][next.xx][next.yy]=1;
                ^
0_0_15925397_15461.cpp:69:24: error: 'std::next' does not have class type
    vis[next.x][next.y][next.xx][next.yy]=1;
                        ^
0_0_15925397_15461.cpp:69:33: error: 'std::next' does not have class type
    vis[next.x][next.y][next.xx][next.yy]=1;
                                 ^