View Compilation Error

0_0_21676379_17448.cpp: In function 'long long int bfs()':
0_0_21676379_17448.cpp:19:32: error: 'k' was not declared in this scope
     while(!q.empty() && cnt <2*k)
                                ^
0_0_21676379_17448.cpp:28:27: error: 'class std::vector<int>' has no member named 'v'
             int vv = e[i].v;
                           ^
0_0_21676379_17448.cpp:43:1: error: expected ';' before '}' token
 }
 ^