Compilare: user.cpp: In function ‘void tarjan(int)’: user.cpp:26:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v[nod].size(); i ++) ^ user.cpp: In function ‘int main()’: user.cpp:72:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < solutii.size(); i ++, fout << '\n') ^ user.cpp:73:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < solutii[i].size(); j ++) ^