#include <iostream>
using namespace std;

int main() {
    
    int n,d; cin >> n >> d;
    
    int a[n-1]; for(int i=0;i<n-1;i++) { cin >> a[i]; }
    
    int ls[n]; ls[0] = 0;
    for(int i=0;i<n-1;i++) { ls[i+1] = ls[i] + a[i]; }
    
    for (int i=0;i<n-1;i++) {
        int dif = ls[i+1] - ls[i];
        if (dif < d) {
            ls[i+1] = ls[i+1] + (d-dif);
        }
    }
    
    for (int i=0;i<n;i++) {
        if (i==0) {
            cout << ls[i];
        } else {
            cout << ' ' << ls[i];
        }
        
    }
    
    return 0;

}