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#include <bits/stdc++.h>

long long f1(long long t[], int x, int n){
    long long currentTime = 0;
    long long result = 0;
    for (int i = 0; i < n; i++){
        if (currentTime + x <= t[i]){
            currentTime = t[i];
        }
        else{
            result += (currentTime+x) - t[i];
            currentTime = currentTime+x;
        }
    }
    return result;
}

int main(){
    std::ios_base::sync_with_stdio(0);
    std::cin.tie(NULL);

    int n, k; // liczba klientow, liczba piecykow
    std::cin >> n >> k;
    long long *t = new long long[n];

    for (int i = 0; i < n; i++)
        std::cin >> t[i];

    int x;
    for (int i = 0; i < k; i++){
        std::cin >> x;
        std::cout << f1(t, x, n) << "\n";
    }
}