View Compilation Error

0_0_22105093_12979.cpp:27:26: error: 'M' was not declared in this scope
 const int maxm = 2 * N + M + N * N + N * M;
                          ^
0_0_22105093_12979.cpp:27:42: error: 'M' was not declared in this scope
 const int maxm = 2 * N + M + N * N + N * M;
                                          ^
0_0_22105093_12979.cpp: In function 'void add(int, int, int, int)':
0_0_22105093_12979.cpp:50:5: error: 'E' was not declared in this scope
     E[tot] = edge(t, head[s], cap, cost);
     ^
0_0_22105093_12979.cpp: In function 'int spfa(int, int)':
0_0_22105093_12979.cpp:68:39: error: 'E' was not declared in this scope
         for (int i = head[u]; ~i; i = E[i].nxt)
                                       ^
0_0_22105093_12979.cpp: In function 'void MCMF(int, int)':
0_0_22105093_12979.cpp:92:28: error: 'E' was not declared in this scope
             Min = min(Min, E[pat[i]].cap);
                            ^
0_0_22105093_12979.cpp:95:13: error: 'E' was not declared in this scope
             E[pat[i]].cap -= Min;
             ^