View Compilation Error

0_0_6405633_29935.cpp: In function `void initial()':
0_0_6405633_29935.cpp:11: error: `max' undeclared (first use this function)
0_0_6405633_29935.cpp:11: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_6405633_29935.cpp: In function `void dfs1(int)':
0_0_6405633_29935.cpp:23: error: `max' undeclared (first use this function)
0_0_6405633_29935.cpp: In function `void dfs2(int)':
0_0_6405633_29935.cpp:49: error: `max' undeclared (first use this function)
0_0_6405633_29935.cpp: In function `int main()':
0_0_6405633_29935.cpp:90: error: `max' undeclared (first use this function)