View Compilation Error

0_0_1111303_23047.cpp: In function `int main()':
0_0_1111303_23047.cpp:23: error: `max' undeclared (first use this function)
0_0_1111303_23047.cpp:23: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_1111303_23047.cpp: In function `void dfs(int, int, int, lbl*, int)':
0_0_1111303_23047.cpp:35: error: `max' undeclared (first use this function)