Compilare: user.cpp: In function ‘void Add_To_Hash(unsigned int)’: user.cpp:15:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<h[nr%MOD].size();i++) ^ user.cpp: In function ‘int Search(unsigned int)’: user.cpp:22:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<h[nr%MOD].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:53:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<h[i].size();j++) ^ user.cpp:43:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("secv5.in","r",stdin); ^ user.cpp:44:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("secv5.out","w",stdout); ^ user.cpp:46:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&N,&L,&U); ^ user.cpp:49:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%u",&S[i]); ^ user.cpp: In function ‘int Search(unsigned int)’: user.cpp:24:1: warning: control reaches end of non-void function [-Wreturn-type] } ^