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

long long n, m, x, answer, last;
long long tab[200006];

void fin(long long &liczba)
{
	bool minus = 0;
	char c = 0;
	liczba = 0;
	while (c<33)c = getchar_unlocked();
	do {
		if (c == '-')minus = 1;
		else liczba = (liczba << 1) + (liczba << 3) + c - '0';
		c = getchar_unlocked();
	} while (c>33);
	if (minus == 1)liczba = -liczba;
}

int main()
{
	ios_base::sync_with_stdio(0);

	fin(n);
	fin(m);
	for (int i = 1;i <= n;i++)
		fin(tab[i]);

	for (int z = 1;z <= m;z++)
	{
		fin(x);
		for (int i = 1;i <= n;i++)
		{
			last += x;
			if (tab[i] < last)
				answer += last - tab[i];
			else
				last = tab[i];
		}

		cout << answer << endl;
		answer = 0;
		last = 0;
	}

	//system("pause");
	return 0;
}