View Compilation Error

0_0_5282406_23206.cpp: In function `void dfs(std::string, int, int)':
0_0_5282406_23206.cpp:29: error: `max' undeclared (first use this function)
0_0_5282406_23206.cpp:29: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_5282406_23206.cpp: In function `int main()':
0_0_5282406_23206.cpp:81: error: `max' undeclared (first use this function)