#include <iostream>
#include <string>
#include <vector>
#include <queue>
#include <deque>
#include <algorithm>
#include <set>
#include <map>
#include <bitset>
#include <cmath>
#include <functional>
#include <iomanip>
#define vll vector<ll>
#define vvvl vector<vvl>
#define vvl vector<vector<ll>>
#define VV(a, b, c, d) vector<vector<d>>(a, vector<d>(b, c))
#define VVV(a, b, c, d) vector<vvl>(a, vvl(b, vll (c, d)));
#define re(c, b) for(ll c=0;c<b;c++)
#define all(obj) (obj).begin(), (obj).end()
typedef long long int ll;
typedef long double ld;
using namespace std;

int main(int argc, char const *argv[]) {
  ll n, d;std::cin >> n >> d;
  vll a(n, 0);
  for(int i=1;i<n;i++) {
    std::cin >> a[i];
    a[i] += a[i-1];
  }

  vll b(n, 0);
  for(int i=1;i<n;i++){
    if(a[i] - b[i-1]<d){
      b[i] = b[i-1] + d;
    }else b[i] = a[i];
  }
  re(i, n) std::cout << b[i] << (i==n-1?"\n":" ");
  return 0;
}