/in/foo.cc: In function 'int find(int)':
/in/foo.cc:16:5: error: 'f' was not declared in this scope
  if(f[x]==x)
     ^
/in/foo.cc:18:10: error: 'f' was not declared in this scope
  int tmp=f[x];
          ^
/in/foo.cc:18:6: warning: unused variable 'tmp' [-Wunused-variable]
  int tmp=f[x];
      ^~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:50:16: error: 'print' was not declared in this scope
  print("%d",ans);
                ^