View Compilation Error

756052_0_0_13976.cpp: In function `void Union(int, int)':
756052_0_0_13976.cpp:29: error: `max' undeclared (first use this function)
756052_0_0_13976.cpp:29: error: (Each undeclared identifier is reported only once for each function it appears in.)
756052_0_0_13976.cpp: In function `int main()':
756052_0_0_13976.cpp:43: error: `max' undeclared (first use this function)