题目：

题解：

void swap(int* a, int* b) {int t = *a;*a = *b, *b = t;
}void reverse(int* nums, int start, int end) {while (start < end) {swap(&nums[start], &nums[end]);start += 1;end -= 1;}
}void rotate(int* nums, int numsSize, int k) {k %= numsSize;reverse(nums, 0, numsSize - 1);reverse(nums, 0, k - 1);reverse(nums, k, numsSize - 1);
}