View Compilation Error

0_0_7953922_7469.cpp: In function `void insert(int, int, int, int, int)':
0_0_7953922_7469.cpp:16: error: `max' undeclared (first use this function)
0_0_7953922_7469.cpp:16: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_7953922_7469.cpp: In function `int query(int, int, int, int, int)':
0_0_7953922_7469.cpp:49: error: `max' undeclared (first use this function)