Compilare: main.cpp: In function 'int dfs(int, int)': main.cpp:26:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:122:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=1;i<w.size();i++) ~^~~~~~~~~ main.cpp:138:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=1;i<w.size();i++) ~^~~~~~~~~ main.cpp: In function 'int get_lca(int, int)': main.cpp:46:1: warning: control reaches end of non-void function [-Wreturn-type] } ^