Compilare: main.cpp: In function 'int main()': main.cpp:41:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < A[i].size(); j++) ~~^~~~~~~~~~~~~ main.cpp:46:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int q = 0; q < A[vecin].size(); q++) ~~^~~~~~~~~~~~~~~~~ main.cpp:83:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < G[nod].size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp:94:39: warning: 'nod' may be used uninitialized in this function [-Wmaybe-uninitialized] out << min(nod, i) << ' ' << max(nod, i); ^~~