Rotate an array of n elements to the right by k steps.
For example, with n = 7 and k = 3, the array [1,2,3,4,5,6,7]
is rotated to [5,6,7,1,2,3,4]
.
解题思路:
JAVA实现如下:
public void rotate(int[] nums, int k) {
k%=nums.length;
k=nums.length-k;
int[] nums2=new int[k];
for(int i=0;i<k;i++)
nums2[i]=nums[i];
for(int i=0;i<nums.length-k;i++)
nums[i]=nums[i+k];
for(int i=0;i<k;i++)
nums[nums.length-k+i]=nums2[i];
}