View Compilation Error

0_0_6563213_5091.cpp:25: error: `MAXM' was not declared in this scope
0_0_6563213_5091.cpp: In function `void add(int, int)':
0_0_6563213_5091.cpp:38: error: `edge' undeclared (first use this function)
0_0_6563213_5091.cpp:38: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_6563213_5091.cpp: In function `void dfs(int)':
0_0_6563213_5091.cpp:45: error: `edge' undeclared (first use this function)