View Compilation Error

0_0_21999341_8751.cpp: In function 'void dfs(int)':
0_0_21999341_8751.cpp:44:35: error: 'x' was not declared in this scope
             if(h[u] < d[v] && rem[x][y] == 1)
                                   ^
0_0_21999341_8751.cpp:44:38: error: 'y' was not declared in this scope
             if(h[u] < d[v] && rem[x][y] == 1)
                                      ^