View Compilation Error

0_0_5423161_9428.cpp: In function `void Union(int, int)':
0_0_5423161_9428.cpp:17: error: `max' undeclared (first use this function)
0_0_5423161_9428.cpp:17: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_5423161_9428.cpp: In function `int main()':
0_0_5423161_9428.cpp:29: error: `max' undeclared (first use this function)
0_0_5423161_9428.cpp:30: error: name lookup of `i' changed for new ISO `for' scoping
0_0_5423161_9428.cpp:25: error:   using obsolete binding at `i'