View Compilation Error

0_0_28239967_5011.cpp: In function 'bool cmp(Node, Node)':
0_0_28239967_5011.cpp:20:14: error: 'class Node' has no member named 'cnt'
     return a.cnt>b.cnt;
              ^
0_0_28239967_5011.cpp:20:20: error: 'class Node' has no member named 'cnt'
     return a.cnt>b.cnt;
                    ^