Compilare: main.cpp: In function 'void sterge(int)': main.cpp:34:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (indexB < graf[b].size() - 1) ~~~~~~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void stergeMuchie(int, int)': main.cpp:86:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (indexB < muchii[y][x].size() - 1) ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:140:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < sol.size(); i++) ~~^~~~~~~~~~~~