rt.\text{rt.}rt.
既然for (int i = 1; i <= 3 * n; i++)的时间复杂度是O(n)O(n)O(n)
for (int i = 1; i <= 3 * n; i++)
那么for (int i = 1; i <= 114514; i++)的时间复杂度就是不是 O(1)O(1)O(1) ??
for (int i = 1; i <= 114514; i++)