Compilare: user.cpp: In function ‘void Read()’: user.cpp:16:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 1; i <= n; ++i) ^ user.cpp: In function ‘long long int Secv(int)’: user.cpp:31:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while( HASH.size() > nr ) ^ user.cpp: In function ‘void Read()’: user.cpp:15:34: 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:18:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^