Compilare: user.cpp: In function ‘void pozitiv_DFS(int)’: user.cpp:16:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nod_plus[sursa].size();++i) ^ user.cpp: In function ‘void negativ_DFS(int)’: user.cpp:28:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nod_minus[sursa].size();++i) ^ user.cpp: In function ‘int main()’: user.cpp:69:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<conexe[i].size();++j) ^