Compilare: user.cpp: In function ‘bool cuplaj(const int&)’: user.cpp:23:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < L[nod].size(); i ++) ^ user.cpp:35:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < L[nod].size(); i ++) ^ user.cpp: In function ‘int main()’: user.cpp:89:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("senat.in", "r", stdin); ^