View Compilation Error

0_0_2986507_7309.cpp: In function `void union_Set(int, int)':
0_0_2986507_7309.cpp:32: error: `upCount' undeclared (first use this function)
0_0_2986507_7309.cpp:32: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_2986507_7309.cpp: In function `int main()':
0_0_2986507_7309.cpp:41: error: `MAXN' undeclared (first use this function)