View Compilation Error

0_0_38825497_9462.cpp: In function 'int LCA::QryLca(int, int)':
0_0_38825497_9462.cpp:36:25: error: return-statement with no value, in function returning 'int' [-fpermissive]
   36 |                         return;
      |                         ^~~~~~
0_0_38825497_9462.cpp: In function 'void slv()':
0_0_38825497_9462.cpp:103:32: error: 'u' was not declared in this scope
  103 |                 scanf("%d%d", &u, &v);
      |                                ^
0_0_38825497_9462.cpp:103:36: error: 'v' was not declared in this scope
  103 |                 scanf("%d%d", &u, &v);
      |                                    ^
0_0_38825497_9462.cpp:115:9: error: 'getans' was not declared in this scope; did you mean 'gets_s'?
  115 |         getans();
      |         ^~~~~~
      |         gets_s