#include <bits/stdc++.h>

int ri() {
    int n;
    scanf("%d", &n);
    return n;
}

int main() {
    int n = ri();
    int d = ri();
    int res[n];
    res[0] = 0;
    for (int i = 1; i < n; i++) res[i] = res[i - 1] + ri();
    for (int i = 1; i < n; i++) res[i] = std::max(res[i], res[i - 1] + d);
    for (auto i : res) {
        if (i) printf(" ");
        printf("%d", i);
    }
    puts("");
    return 0;
}