#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, k;
  cin >> n >> k;
  int arr[n];
  for (int i = 0; i < n; i++) cin >> arr[i];
  int result = 0;
  for (int i = 1; i < n; i++) {
    if (arr[i] + arr[i - 1] < k) {
      result += (k - (arr[i] + arr[i - 1]));
      arr[i] += (k - (arr[i] + arr[i - 1]));
    }
  }
  cout << result << endl;
  for (int i = 0; i < n; i++) cout << arr[i] << " ";
  return 0;
}
