Compilare: user.cpp: In function ‘void tarjan(int)’: user.cpp:35:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Lista[nc].size();i++){ ^ user.cpp: In function ‘int main()’: user.cpp:94:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<ctc[i].size();j++) ^ user.cpp:96:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=1;j<ctc[i].size();j++) ^