GB
#define GB (1024L * 1024L * 1024L)
#define GB (1024 * 1024 * 1024UL)
#define GB (1024UL * 1024 * 1024)
#define GB (1024 * 1024 * 1024)
#define GB (1024 * MB)
#define GB (1024 * MB)
#define GB (1024UL * MB)
#define GB (1024 * 1024 * 1024UL)
#define GB (1024ULL*1024*1024)
#define GB (1024UL * MB)
#define GB (1UL << 30)
#define GB (1024 * 1024 * 1024UL)