Compilare: main.cpp: In function 'bool parse(std::vector<int>::iterator, std::vector<std::vector<short int> >&, std::vector<int>&)': main.cpp:30:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int c = 0; c < graf.size(); ++c) { ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:82:17: warning: 'p2' may be used uninitialized in this function [-Wmaybe-uninitialized] int p1, p2; ^~ main.cpp:105:17: warning: 'p1' may be used uninitialized in this function [-Wmaybe-uninitialized] extra[p1]++; extra[p2]++; ^