View Compilation Error

0_0_37807741_15351.cpp:18:22: error: 'Maxm' was not declared in this scope
 int a[Maxn + 5], cnt[Maxm + 5], pre[Maxn + 5];
                      ^
0_0_37807741_15351.cpp: In function 'void Add(int)':
0_0_37807741_15351.cpp:49:12: error: 'cnt' was not declared in this scope
     ret += cnt[pre[p]] ++;
            ^
0_0_37807741_15351.cpp: In function 'void Del(int)':
0_0_37807741_15351.cpp:53:15: error: 'cnt' was not declared in this scope
     ret -= -- cnt[pre[p]];
               ^
0_0_37807741_15351.cpp: In function 'int main()':
0_0_37807741_15351.cpp:89:17: error: 'cnt' was not declared in this scope
         memset (cnt, 0, sizeof cnt);
                 ^