【leetcode】189. Rotate Array

题目

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].

代码

#include 
#include 
#include 
using namespace std;

int main(int argc, char const *argv[]) {

  int nums[]={1,2,3,4,5,6,7};
  int n=7;
  int k=3;

  k %= n;
  if (k) {
    std::vector<int> v(nums, nums + n);
    std::copy(v.begin() + n - k, v.end(), nums);
    std::copy(v.begin(), v.begin() + n - k, nums+k);
  }

  for (int i = 0; i < n; ++i) {
    cout<",";
  }

  return 0;
}