View Compilation Error

0_0_4281014_5945.cpp: In function `void Union(int, int)':
0_0_4281014_5945.cpp:32: error: `max' undeclared (first use this function)
0_0_4281014_5945.cpp:32: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4281014_5945.cpp: In function `int main()':
0_0_4281014_5945.cpp:44: error: `max' undeclared (first use this function)