Compilare: main.cpp: In function 'int parcurge(int, std::vector<std::vector<int> >&, std::vector<bool>&)': main.cpp:7:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < edges[i].size(); j++) ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:32:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < edges[act].size(); i++) { ~~^~~~~~~~~~~~~~~~~~~ main.cpp:14:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("darb.in", "r", stdin); ^ main.cpp:15:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("darb.out", "w", stdout); ^ main.cpp:39:39: warning: 'act' may be used uninitialized in this function [-Wmaybe-uninitialized] cout << parcurge(act, edges, vazut); ^