#include <bits/stdc++.h>
// clang-format off
using namespace std; using ll=long long; using ull=unsigned long long; using pll=pair<ll,ll>; const ll INF=4e18;
void print0(){}; template<typename H,typename... T> void print0(H h,T... t){cout<<h;print0(t...);}
void print(){print0("\n");}; template<typename H,typename... T>void print(H h,T... t){print0(h);if(sizeof...(T)>0)print0(" ");print(t...);}
void perr0(){}; template<typename H,typename... T> void perr0(H h,T... t){cerr<<h;perr0(t...);}
void perr(){perr0("\n");}; template<typename H,typename... T>void perr(H h,T... t){perr0(h);if(sizeof...(T)>0)perr0(" ");perr(t...);}
void ioinit() { cout<<fixed<<setprecision(15); cerr<<fixed<<setprecision(6); ios_base::sync_with_stdio(0); cin.tie(0); }
#define debug1(a) { cerr<<#a<<":"<<a<<endl; }
#define debug2(a,b) { cerr<<#a<<":"<<a<<" "<<#b<<":"<<b<<endl; }
#define debug3(a,b,c) { cerr<<#a<<":"<<a<<" "<<#b<<":"<<b<<" "<<#c<<":"<<c<<endl; }
#define debug4(a,b,c,d) { cerr<<#a<<":"<<a<<" "<<#b<<":"<<b<<" "<<#c<<":"<<c<<" "<<#d<<":"<<d<<endl; }
// clang-format on

int main() {
    // 場所ごとに「減り始めるイベント」「減らなくなるイベント」が1回ずつある
    // 地獄のような平方分割
    ioinit();
    ll N;
    cin >> N;
    vector<pll> AT(N);
    for (ll i = 0; i < N; i++) {
        cin >> AT[i].first >> AT[i].second;
    }
    ll Q;
    cin >> Q;
    using tll = tuple<ll, ll, ll>;
    using qll = tuple<ll, ll, ll, ll>;
    vector<tll> queries;
    for (ll i = 0; i < Q; i++) {
        ll d, l, r;
        cin >> d >> l >> r;
        l--;
        r--;
        queries.push_back({d, l, r});
    }
    vector<qll> evt;
    for (ll i = 0; i < N; i++) {
        ll t = AT[i].second;
        evt.push_back({t, 0, -1, i});
        ll t2 = AT[i].first + AT[i].second - 1;
        evt.push_back({t2, 0, 1, i});
    }
    for (ll i = 0; i < Q; i++) {
        ll d, l, r;
        tie(d, l, r) = queries[i];
        evt.push_back({d, 1, i, i});
    }

    const ll SQ = 500;
    vector<ll> i2b(N);
    for (ll i = 0; i < N; i++) {
        i2b[i] = (i / SQ);
    }

    ll BK = i2b[N - 1] + 1;
    vector<vector<ll>> b2i(BK);
    vector<ll> bleft(BK, INF);
    vector<ll> bright(BK, -1);
    for (ll i = 0; i < N; i++) {
        ll b = i2b[i];
        b2i[b].push_back(i);
        bleft[b] = min(bleft[b], i);
        bright[b] = max(bright[b], i);
    }
    vector<ll> sum(BK);
    vector<ll> diff(BK, 0);
    for (ll b = 0; b < BK; b++) {
        ll s = 0;
        for (auto i : b2i[b]) {
            s += AT[i].first;
        }
        sum[b] = s;
    }

    vector<ll> ans(Q);
    ll pre_tim = 0;
    sort(evt.begin(), evt.end());
    for (auto e : evt) {
        ll tim, kind, _tmp, _tmp2;
        tie(tim, kind, _tmp, _tmp2) = e;
        ll tim_diff = tim - pre_tim;
        if (kind == 1) {
            ll qid = _tmp;
            for (ll b = 0; b < BK; b++) {
                sum[b] += diff[b] * tim_diff;
            }
            ll d, l, r;
            tie(d, l, r) = queries[qid];

            ll s = 0;
            {
                for (ll b = 0; b < BK; b++) {
                    if (l <= bleft[b] && bright[b] <= r) {
                        s += sum[b];
                        continue;
                    }
                    if (r < bleft[b]) continue;
                    if (bright[b] < l) continue;
                    for (auto i : b2i[b]) {
                        if (l <= i && i <= r) {
                            ll now = AT[i].first;
                            if (tim >= AT[i].second) {
                                now -= tim - AT[i].second + 1;
                                if (now < 0) now = 0;
                            }
                            s += now;
                        }
                    }
                }
            }
            ans[qid] = s;
        } else {
            ll d = _tmp;
            ll i = _tmp2;
            for (ll b = 0; b < BK; b++) {
                sum[b] += diff[b] * tim_diff;
            }
            if (d < 0) sum[i2b[i]]--;
            diff[i2b[i]] += d;
            // debug3(tim, diff[0], sum[0]);
        }
        pre_tim = tim;
    }
    for (ll q = 0; q < Q; q++) {
        print(ans[q]);
    }
    return 0;
}