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