Compilare: main.cpp: In function 'int BFS()': main.cpp:37:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < Graf[nod_curent].size(); ++i) { ~~^~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:98:17: warning: ignoring return value of 'int system(const char*)', declared with attribute warn_unused_result [-Wunused-result] system("PAUSE"); ^