Compilare: main.cpp: In function 'void bfs(int)': main.cpp:68:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < graf[nod].size(); i++) ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:102:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < cost.size(); ++j) ~~^~~~~~~~~~~~~ main.cpp:148:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < muchii.size() && sol.size() < n - 1; ++i) ~~^~~~~~~~~~~~~~~ main.cpp:148:57: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < muchii.size() && sol.size() < n - 1; ++i) ~~~~~~~~~~~^~~~~~~ main.cpp:162:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < sol.size(); i++) ~~^~~~~~~~~~~~