Compilare: user.cpp: In function ‘void in(int)’: user.cpp:11:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0;j<v[el%p].size();j++) ^ user.cpp: In function ‘void eras(int)’: user.cpp:27:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] { for (int i=0;i<v[a%p].size();i++) ^ user.cpp: In function ‘bool f(int)’: user.cpp:39:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<v[el%p].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:51:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] { freopen ("hashuri.in","r",stdin); ^ user.cpp:52:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("hashuri.out","w",stdout); ^ user.cpp:55:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:58:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&g,&el); ^