#include <stdio.h>
#include <inttypes.h>

void rot( uint64_t *i, int n ) {
	uint64_t x = *i;
	uint64_t add = x << (64 - n);
	x = x >> n;
	x = x & add;
	*i = x;
}

int main() {
	uint64_t test = 1;
	printf("%d -> ", test);
	rot(&test,1);
	printf("%d\n",test);
}