View Compilation Error

0_0_34719238_24487.cpp: In function 'bool cmp(node, node)':
0_0_34719238_24487.cpp:19:29: error: 'struct node' has no member named 'a'
  return a.ac!=b.ac ? a.ac>b.a : c(a.score!=b.score ? a.score<b.score : strcmp(a.name,b.name));
                             ^
0_0_34719238_24487.cpp:19:93: error: 'c' was not declared in this scope
  return a.ac!=b.ac ? a.ac>b.a : c(a.score!=b.score ? a.score<b.score : strcmp(a.name,b.name));
                                                                                             ^