Compilare: main.cpp: In function 'void bfs(int, int, std::vector<std::vector<int> >)': main.cpp:33:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[y].size();i++) { ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:61:22: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings] citire("bfs.in",g); ^ main.cpp:63:21: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings] afis("bfs.out",N); ^