Compilare: user.cpp: In function ‘int main()’: user.cpp:160:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < onCircle[i].size(); ++ j) ^ user.cpp:164:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i <= Map.size(); ++ i) ^ user.cpp:126:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cerc.in", "r", stdin); ^ user.cpp:127:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cerc.out", "w", stdout); ^