Compilare: main.cpp: In function 'int main()': main.cpp:71:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i <nod_min.size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp:75:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < nod_min.size(); j++) ~~^~~~~~~~~~~~~~~~