View Compilation Error

0_0_9387433_22109.cpp: In function `void dp()':
0_0_9387433_22109.cpp:23: error: `max' undeclared (first use this function)
0_0_9387433_22109.cpp:23: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_9387433_22109.cpp: In function `int main()':
0_0_9387433_22109.cpp:31: error: `max' undeclared (first use this function)