View Compilation Error

0_0_26203848_28019.cpp: In function 'int Get(int, int)':
0_0_26203848_28019.cpp:170:40: error: 'z' was not declared in this scope
             Update(1, pos[f2], pos[v], z);
                                        ^
0_0_26203848_28019.cpp:178:40: error: 'z' was not declared in this scope
             Update(1, pos[f1], pos[u], z);
                                        ^
0_0_26203848_28019.cpp:184:35: error: 'z' was not declared in this scope
         Update(1, pos[u], pos[v], z);
                                   ^
0_0_26203848_28019.cpp:189:35: error: 'z' was not declared in this scope
         Update(1, pos[v], pos[u], z);
                                   ^