View Compilation Error

0_0_1588644_3722.cpp: In function `void dfs(int, float)':
0_0_1588644_3722.cpp:12: error: `max' undeclared (first use this function)
0_0_1588644_3722.cpp:12: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_1588644_3722.cpp: In function `int main()':
0_0_1588644_3722.cpp:52: error: `max' undeclared (first use this function)