#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define F first
#define S second
#define pb push_back
#define pii pair<int, int>
const int N = 2e5 + 5;
const int inf = 1e9 + 10;
int n, h[N], q, a[N], b[N];
int res[N];
vector<int> ev[N];
vector<pii> que[N];
struct Node {
int mx, mn, lazy_mx, lazy_mn, res;
Node() {
lazy_mx = mx = - inf;
lazy_mn = mn = inf;
res = - inf;
}
Node operator + (const Node &o) {
Node ret = Node();
ret.mx = max(mx, o.mx);
ret.mn = min(mn, o.mn);
ret.res = max(res, o.res);
return ret;
}
} st[4 * N];
void down(int id) {
st[id * 2].lazy_mx = max(st[id * 2].lazy_mx, st[id].lazy_mx);
st[id * 2].lazy_mn = min(st[id * 2].lazy_mn, st[id].lazy_mn);
st[id * 2 + 1].lazy_mx = max(st[id * 2 + 1].lazy_mx, st[id].lazy_mx);
st[id * 2 + 1].lazy_mn = min(st[id * 2 + 1].lazy_mn, st[id].lazy_mn);
st[id * 2].res = max(st[id * 2].res, st[id * 2].mx - st[id].lazy_mn);
st[id * 2].res = max(st[id * 2].res, st[id].lazy_mx - st[id * 2].mn);
st[id * 2 + 1].res = max(st[id * 2 + 1].res, st[id * 2 + 1].mx - st[id].lazy_mn);
st[id * 2 + 1].res = max(st[id * 2 + 1].res, st[id].lazy_mx - st[id * 2 + 1].mn);
st[id].lazy_mn = inf;
st[id].lazy_mx = - inf;
}
void update(int id, int l, int r, int i, int x) {
if (l == r) {
if (x == inf) {
st[id].mx = - inf;
st[id].mn = inf;
}
else {
st[id].mx = st[id].mn = x;
}
return;
}
down(id);
int mid = (l + r) / 2;
if (i <= mid) update(id * 2, l, mid, i, x);
else update(id * 2 + 1, mid + 1, r, i, x);
st[id] = st[id * 2] + st[id * 2 + 1];
}
void update(int id, int l, int r, int u, int v, int x) {
if (l > v || r < u) return;
if (u <= l && r <= v) {
st[id].lazy_mx = max(st[id].lazy_mx, x);
st[id].lazy_mn = min(st[id].lazy_mn, x);
st[id].res = max(st[id].res, st[id].mx - x);
st[id].res = max(st[id].res, x - st[id].mn);
return;
}
int mid = (l + r) / 2;
down(id);
update(id * 2, l, mid, u, v, x);
update(id * 2 + 1, mid + 1, r, u, v, x);
st[id] = st[id * 2] + st[id * 2 + 1];
}
int get(int id, int l, int r, int u, int v) {
if (l > v || r < u) return - inf;
if (u <= l && r <= v) {
return st[id].res;
}
int mid = (l + r) / 2;
down(id);
return max(get(id * 2, l, mid, u, v), get(id * 2 + 1, mid + 1, r, u, v));
}
signed main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
cin >> n;
for (int i = 1; i <= n; i++) {
cin >> h[i];
cin >> a[i] >> b[i];
if (i + a[i] <= n) ev[i + a[i]].pb(i);
if (i + b[i] + 1 <= n) ev[i + b[i] + 1].pb(- i);
}
cin >> q;
for (int i = 1; i <= q; i++) {
int l, r; cin >> l >> r;
que[r].pb({l, i});
}
for (int i = 1; i <= n; i++) {
for (auto x : ev[i]) {
if (x < 0) {
update(1, 1, n, -x, inf);
}
else {
update(1, 1, n, x, h[x]);
}
}
if (i - a[i] >= 1) update(1, 1, n, max(1, i - b[i]), i - a[i], h[i]);
for (auto it : que[i]) {
res[it.S] = max(-1, get(1, 1, n, it.F, i));
}
}
for (int i = 1; i <= q; i++) {
cout << res[i] << '\n';
}
}
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