#include <inttypes.h>

uint32_t nsamebit(uint64_t, uint64_t, uint64_t);

uint32_t nsamebit(uint64_t a, uint64_t b, uint64_t c)
{
	uint32_t n;
	uint64_t x = ~((a ^ b) | (a ^ c));
	for (n = 0; x; x >>= 1)
		n += (uint32_t)(x & 1);
	return n;
}