View Compilation Error

0_0_5482721_18824.cpp: In function `void PushUP(int)':
0_0_5482721_18824.cpp:12: error: `max' undeclared (first use this function)
0_0_5482721_18824.cpp:12: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_5482721_18824.cpp: In function `int query(int, int, int, int, int)':
0_0_5482721_18824.cpp:51: error: `max' undeclared (first use this function)