#include <bits/stdc++.h>
#define eb emplace_back
#define upmin(a,b) (a)=min((a),(b))
#define upmax(a,b) (a)=max((a),(b))
#define INF (0x3f3f3f3f)
using namespace std;
const int MAXN = 200055;
const int MAXQ = 200055;
struct SEG {
SEG() { init(); }
int dp[MAXN*3], dmn[MAXN*3], dmx[MAXN*3];
void init() {
fill(dp, dp+MAXN*3, -INF);
fill(dmn, dmn+MAXN*3, INF);
memset(dmx, 0, MAXN*12);
}
void prop(int i, int s, int e) {
upmax(dp[i], dmx[i] - dmn[i]);
if(s != e) {
upmax(dmx[i<<1], dmx[i]);
upmax(dmx[i<<1|1], dmx[i]);
}
dmx[i] = 0;
}
void cal(int i, int s, int e) {
if(s == e) return;
upmax(dp[i], max(dp[i<<1], dp[i<<1|1]));
dmn[i] = min(dmn[i<<1], dmn[i<<1|1]);
}
void upd(int i, int s, int e, int p, int q, int r) {
prop(i, s, e); if(q < p || e < p || q < s) return;
if(p <= s && e <= q) {
dmx[i] = r;
upmax(dp[i], r - dmn[i]);
return;
}
int m = (s+e) >> 1;
upd(i<<1, s, m, p, q, r);
upd(i<<1|1, m+1, e, p, q, r);
cal(i, s, e);
}
void upd(int i, int s, int e, int x, int r) {
prop(i, s, e); if(x < s || e < x) return;
if(s == e) {
dmn[i] = r;
return;
}
int m = (s+e) >> 1;
upd(i<<1, s, m, x, r);
upd(i<<1|1, m+1, e, x, r);
cal(i, s, e);
}
int get(int i, int s, int e, int p, int q) {
prop(i, s, e); if(q < p || e < p || q < s) return -INF;
if(p <= s && e <= q) {
int ret = dp[i];
cal(i, s, e);
return ret;
}
int m = (s+e) >> 1;
int ret = max(get(i<<1, s, m, p, q), get(i<<1|1, m+1, e, p, q));
cal(i, s, e);
return ret;
}
} seg;
vector<int> PushV[MAXN], PopV[MAXN], QV[MAXN];
int A[MAXN], B[MAXN], H[MAXN];
int S[MAXQ], E[MAXQ];
int Ans[MAXQ];
int N, Q;
void solve() {
for(int i = 1; i <= Q; i++) QV[E[i]].eb(i);
for(int i = 1; i <= N; i++) {
PushV[min(N+1, i+A[i])].eb(i);
PopV[min(N+1, i+B[i]+1)].eb(i);
}
for(int j = 1; j <= N; j++) {
for(int i : PushV[j]) seg.upd(1, 1, N, i, H[i]);
for(int i : PopV[j]) seg.upd(1, 1, N, i, INF);
seg.upd(1, 1, N, max(1, j-B[j]), j-A[j], H[j]);
for(int q : QV[j]) upmax(Ans[q], seg.get(1, 1, N, S[q], j-1));
}
}
int main() {
ios::sync_with_stdio(false);
cin >> N; for(int i = 1; i <= N; i++) cin >> H[i] >> A[i] >> B[i];
cin >> Q; for(int i = 1; i <= Q; i++) cin >> S[i] >> E[i];
fill(Ans, Ans+Q+1, -1);
solve();
seg.init();
reverse(A+1, A+N+1);
reverse(B+1, B+N+1);
reverse(H+1, H+N+1);
for(int i = 1; i <= Q; i++) {
swap(S[i], E[i]);
S[i] = N-S[i]+1;
E[i] = N-E[i]+1;
}
for(int i = 0; i <= N; i++) {
PushV[i].clear();
PopV[i].clear();
QV[i].clear();
}
solve();
for(int i = 1; i <= Q; i++) printf("%d\n", Ans[i]);
return 0;
}
