Compilare: main.cpp: In function 'int dfs(int, int)': main.cpp:26:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Ad[nod].size();++i) ~^~~~~~~~~~~~~~~ main.cpp:46:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int solve(int)': main.cpp:50:9: warning: unused variable 'w' [-Wunused-variable] int w; ^