if(get_user_flags(id) & ADMIN_LEVEL_F && ADMIN_LEVEL_G && ADMID_LEVEL_H){ //do stuff}
const FlagsNeeded = ADMIN_LEVEL_F | ADMIN_LEVEL_G | ADMID_LEVEL_H;if( ( get_user_flags(id) & FlagsNeeded ) == FlagsNeeded ){ //do stuff}