母牛的故事 （C++代码）

解题思路:

注意事项:

参考代码:

#include <iostream>
#include <algorithm>
#include <string>
#include <vector>
using namespace std;

int main()
{
 int adult, one, two, three, all;
 int input;
 while (1)
 {
  scanf("%d", &input);
  if (input == 0) break;
  int i;
  for (adult = 1, one = 0, two = 0, three = 0, i = 0; i < input-1; i++)
  {
   adult += three;
   three = two;
   two = one;
   one = adult;
  }
  all = adult + three + two + one;
  printf("%d\n", all);
 }
 system("pause");
 return 0;
}