Compilare: main.cpp: In function 'int dfs_find(int, int, int)': main.cpp:19:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[node].size(); i++) ~~^~~~~~~~~~~~~~~~ main.cpp:23:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int dfs_sol(int, int, int)': main.cpp:30:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[node].size(); i++) ~~^~~~~~~~~~~~~~~~ main.cpp:33:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^