View Compilation Error

0_0_20249943_17392.cpp:30:12: error: 'MAXM' was not declared in this scope
     } edge[MAXM];
            ^
0_0_20249943_17392.cpp: In member function 'void ZKW_flow::addedge(int, int, LL, LL)':
0_0_20249943_17392.cpp:38:9: error: 'edge' was not declared in this scope
         edge[tot] = Edge(v, head[u], cap, cost);
         ^
0_0_20249943_17392.cpp: In member function 'void ZKW_flow::SPFA()':
0_0_20249943_17392.cpp:56:42: error: 'edge' was not declared in this scope
             for(int p = head[u]; ~p; p = edge[p].next)
                                          ^
0_0_20249943_17392.cpp: In member function 'int ZKW_flow::add_flow(int, int)':
0_0_20249943_17392.cpp:80:38: error: 'edge' was not declared in this scope
         for(int p = head[u]; ~p; p = edge[p].next)
                                      ^
0_0_20249943_17392.cpp: In member function 'bool ZKW_flow::modify_label()':
0_0_20249943_17392.cpp:99:46: error: 'edge' was not declared in this scope
                 for(int p = head[u]; ~p; p = edge[p].next)
                                              ^