1.

1.#

 1#include <iostream>
 2
 3using namespace std;
 4
 5int mys(int a[], int n) {
 6  static int x  = 0;
 7  int b         = a[n] / 3;
 8  x            += b;
 9  return x % 4;
10}
11
12int main() {
13  int a[] = {0, 1, 4, 5};
14  for (int i = 0; i < 4; i++) {
15    cout << mys(a, i) << endl;
16  }
17  return 0;
18}