Compilare: main.cpp: In function 'void dfs1(int)': main.cpp:13:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();++i) ~^~~~~~~~~~~~~~ main.cpp: In function 'void dfs2(int)': main.cpp:26:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<vt[nod].size();++i) ~^~~~~~~~~~~~~~~ main.cpp: In function 'void golesc(int, int)': main.cpp:35:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<w[nod].size();++i) ~^~~~~~~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:50:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<usu[nod].size();++j) sol.push_back(usu[nod][j]); ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:85:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[i].size();++i) ~^~~~~~~~~~~~ main.cpp:99:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sol.size();++i) g<<sol[i]<<' '; ~^~~~~~~~~~~