郑震云 · 发布于 2024-12-04 · 浏览 461 回复 0

int n, s = 1, i;
scanf("%d", &n);
for (int i = 2; i <= n - 1; i++) {
	if (n % i == 0)
		s = 0;
}
if (s == 1)
	printf("1");
else
	printf("-1");

return 0;