View Compilation Error

0_0_24460867_59.cpp:29:15: error: 'maxn' was not declared in this scope
 char maze[30][maxn],peo[30][maxn];
               ^
0_0_24460867_59.cpp:29:29: error: 'maxn' was not declared in this scope
 char maze[30][maxn],peo[30][maxn];
                             ^
0_0_24460867_59.cpp: In function 'int Dinic()':
0_0_24460867_59.cpp:90:25: error: 'INF' was not declared in this scope
         while(d = dfs(0,INF)){
                         ^
0_0_24460867_59.cpp: In function 'void Solve()':
0_0_24460867_59.cpp:99:9: error: 'peo' was not declared in this scope
     CLR(peo); CLR(maze);
         ^
0_0_24460867_59.cpp:14:23: note: in definition of macro 'CLR'
 #define CLR(x) memset(x,0,sizeof(x))
                       ^
0_0_24460867_59.cpp:99:19: error: 'maze' was not declared in this scope
     CLR(peo); CLR(maze);
                   ^
0_0_24460867_59.cpp:14:23: note: in definition of macro 'CLR'
 #define CLR(x) memset(x,0,sizeof(x))
                       ^
0_0_24460867_59.cpp:129:66: error: 'INF' was not declared in this scope
                     addEdge(i * m + j + n * m + 1, x * m + y + 1,INF);
                                                                  ^