Rotate Array
class Solution {
public void rotate(int[] nums, int k) {
if (nums == null || nums.length == 0) {
return;
}
int[] a = new int[nums.length];
for (int i = 0; i < nums.length; i++) {
a[(i + k) % nums.length] = nums[i];
}
for (int i = 0; i < nums.length; i++) {
nums[i] = a[i];
}
}
}
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