Compilare: user.cpp: In function ‘int dfs(int)’: user.cpp:13:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<g[nod].size(); i++) ~^~~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:56:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[insula].size();i++) ~^~~~~~~~~~~~~~~~~ user.cpp: In function ‘int dfs(int)’: user.cpp:16:1: warning: control reaches end of non-void function [-Wreturn-type] } ^