Compilare: user.cpp: In function ‘int Find(int)’: user.cpp:17:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int poz=0;poz<H[list].size();poz++) ^ user.cpp: In function ‘void Add(int)’: user.cpp:26:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int poz=0;poz<H[list].size();poz++) ^ user.cpp: In function ‘void Delete(int)’: user.cpp:39:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int poz=0;poz<H[list].size();poz++) ^ user.cpp: In function ‘void df(int, int)’: user.cpp:51:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0;j<v[nod].size();j++) ^ user.cpp: In function ‘int main()’: user.cpp:58:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arbore3.in","r",stdin); ^ user.cpp:59:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arbore3.out","w",stdout); ^ user.cpp:60:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&s); ^ user.cpp:62:52: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&y,&val[i]),v[y].push_back(i); ^