#include <bits/stdc++.h>

using namespace std;

int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);

    int n, q;
    cin >> n >> q;

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

    sort(p.begin(), p.end());

    vector<uint64_t> bottom_sums(n+1);

    uint64_t sum = 0;
    for(int i = 0; i <= n; ++i){
        bottom_sums[i] = sum;
        sum += p[i];
    }

    for(int i = 0; i < q; ++i){
        int x, y;
        cin >> x >> y;

        uint64_t ans = bottom_sums[n - x + y] - bottom_sums[n - x];
        cout << ans << '\n';
    }

    cout << flush;

    return 0;
}