View Compilation Error

108737_0_13784.cpp: In function `void DFS(int, int, int, int)':
108737_0_13784.cpp:18: error: `max' undeclared (first use this function)
108737_0_13784.cpp:18: error: (Each undeclared identifier is reported only once for each function it appears in.)
108737_0_13784.cpp: In function `int main()':
108737_0_13784.cpp:150: error: `max' undeclared (first use this function)