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

#ifdef LOCAL
#include "debug.h"
#else
#define debug(x...)
#endif

using ll = long long;
using ull = unsigned long long;
using db = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using pdd = pair<db, db>;
using tiii = tuple<int, int, int>;
using str = string;

#define vt vector
#define pb push_back
#define eb emplace_back
#define ins insert
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define sz(x) (int)x.size()

#define mp make_pair
#define mt make_tuple
#define fi first
#define se second

constexpr int maxN = 1e5;
constexpr int S = 317;

vt<int> a(maxN);

struct Block {
    int l, r;
    vt<vt<int>> data;

    Block(int lx, int rx) {
        l = lx;
        r = rx;
        data.assign(S + 1, vt<int> (S + 1));
        for (int i = l; i < r; i++) {
            for (int p = 1; p <= S; p++) {
                data[p][(i - l) % p] += a[i];
            }
        }
        debug(data);
    }

    int calc(int p, int q) {
        debug(data, p, q - (l % p));
        int c = q - (l % p);
        if (c < 0) {
            c += p;
        }
        return data[p][c];
    }

};

vt<Block> sd;

void solve() {
    int n, Q;
    cin >> n >> Q;
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
    for (int l = 0; l < n; l += S) {
        sd.pb(Block(l, min(n, l + S)));
    }
    while (Q--) {
        int p, q;
        cin >> q >> p;
        if (p == q) {
            cout << "0\n";
            continue;
        }
        // sum(a[i]), i = p * k + q; k = 0 .. (n - q - 1) / p
        if ((n - q - 1) / p + 1 <= S) {
            int ans = 0;
            for (int k = 0; k <= (n - q - 1) / p; k++) {
                ans += a[p * k + q];
            }
            cout << ans << '\n';
        } else {
            // p <= S
            int ans = 0;
            for (int i = 0; i < sz(sd); i++) {
                ans += sd[i].calc(p, q);
            }
            cout << ans << '\n';
        }
    }
}

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    // freopen("input.txt", "r", stdin);
    // freopen("output.txt", "w", stdout);
    int tests = 1;
    // cin >> tests;
    while (tests--) {
        solve();
    }
    return 0;
}