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View Compilation Error

0_0_36190290_29544.cpp: In function 'int mg(int, int)':
0_0_36190290_29544.cpp:13:19: error: request for member 'r' in 'f[x]', which is of non-class type 'int'
  else d[x]=d[f[x].r]+1;
                   ^


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