View Compilation Error

0_0_21985103_2512.cpp:10:25: error: 'N' was not declared in this scope
 int num[1 << 12], f[30][N][1 << 12];
                         ^
0_0_21985103_2512.cpp: In member function 'int AC_auto::solve(int, int, int)':
0_0_21985103_2512.cpp:57:6: error: 'f' was not declared in this scope
      f[0][0][0] = 1;
      ^
0_0_21985103_2512.cpp: In function 'int main()':
0_0_21985103_2512.cpp:98:10: error: 'f' was not declared in this scope
   memset(f, 0, sizeof(f));
          ^