// 3221225472 has mod 2**32 == 0 ...

void main(){
	unsigned n1, n2, new, i;

	n1 = 0;
	n2 = 1;
	
	for ( i = 2; ; i++ ) {
		if ( i < 2 ) {
			printf("Circled i around!  Now %u!\n",i);
			exit(1);
		}

		new = n1+n2;
		n1 = n2;
		n2 = new;
		if ( n2 == 0 ) {
			printf("%u: %u\n", i, n2);
			exit(0);
		}
	}
}