Compilare: user.cpp: In function ‘void BFS()’: user.cpp:28:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<w[x].size();++i) ^ user.cpp:30:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(++gr[w[x][i]] == v[w[x][i]].size()) cd.push(w[x][i]); ^ user.cpp:34:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[x].size();++i) ^ user.cpp:42:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[x].size();++i) ^ user.cpp: In function ‘void Solve()’: user.cpp:60:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();++i) if(drum[v[nod][i]] == niv) ^ user.cpp: In function ‘int main()’: user.cpp:89:12: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[a].push_back(b); ^ user.cpp:90:12: warning: array subscript has type ‘char’ [-Wchar-subscripts] w[b].push_back(a); ^ user.cpp:91:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] exist[a] = exist[b] = true; ^ user.cpp:91:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] exist[a] = exist[b] = true; ^