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#include <iostream>
#include <vector>

using namespace std;

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

    int n, m, p;
    cin >> n >> m;

    vector<int> sz_wzrostu(n);
    vector<long long int> skoszone;
    skoszone.resize(n, 0);

    for (int i = 0; i < n; i++)
    {
        cin >> p;
        sz_wzrostu[i] = p;
    }

    long long int d, b, pom;
    long long int suma;
    for (int i = 0; i < m; i++)
    {
        cin >> d >> b;
        suma = 0;

        for (int j = 0; j < n; j++)
        {
            pom = ((sz_wzrostu[j] * d) - skoszone[j]) - b;
            if (pom > 0)
            {
                suma += pom;
                skoszone[j] += pom;
            }
        }

        cout << suma << endl;
    }

    return 0;
}