#include <bits/stdc++.h>
using namespace std;

int main()
{
	int N, D;
	cin >> N >> D;
	vector<int> a( N - 1 );
	for( int i = 0; i < N - 1; i++ ) {
		cin >> a[i];
	}

	vector<long long> ans( N );
	for( int i = 1; i < N; i++ ) {
		ans[i] = ans[i - 1] + a[i - 1];
	}
	for( int i = 1; i < N; i++ ) {
		int d = ans[i] - ans[i - 1];
		if( d < D ) ans[i] += D - d;
	}

	for( int i = 0; i < N; i++ ) {
		if( i ) cout << " ";
		cout << ans[i];
	}
	cout << endl;
}