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View Compilation Error

0_0_28567696_28613.cpp:5:7: error: 'maxn' was not declared in this scope
 int p[maxn];
       ^
0_0_28567696_28613.cpp: In function 'int find(int)':
0_0_28567696_28613.cpp:9:14: error: 'p' was not declared in this scope
  while (x != p[x])
              ^
0_0_28567696_28613.cpp: In function 'void link(int, int)':
0_0_28567696_28613.cpp:19:3: error: 'p' was not declared in this scope
   p[fa] = fb;
   ^
0_0_28567696_28613.cpp: In function 'int main()':
0_0_28567696_28613.cpp:32:4: error: 'p' was not declared in this scope
    p[i] = i;
    ^
0_0_28567696_28613.cpp:40:8: error: 'p' was not declared in this scope
    if (p[i] == i)
        ^


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