#include<bits/stdc++.h>
using namespace std;
typedef long long int lld;
typedef pair<lld,lld> pii;
#define rep(i,a,b) for(int i=a;i<b;i++)
#define trav(a,v) for(auto a:v)
int n;
lld h[1000000];
lld a[1000000];
lld b[1000000];
lld answer[3000][3000];
lld Max(lld a, lld b){
if(a==-1)return b;
if(b==-1)return a;
return max(a,b);
}
lld Min(lld a, lld b){
if(a==-1)return b;
if(b==-1)return a;
return min(a,b);
}
class ST{
lld tree1[1000000];
lld tree2[1000000];
public:
void build(int a, int b, int node){
tree1[node]=-1;
tree2[node]=-1;
if(a==b)return;
int mid=(a+b)/2;
build(a,mid,2*node);
build(mid+1,b,2*node+1);
}
void update(int a, int b, int node, int pos, lld val){
if(pos<a || b<pos)return;
if(a==b){
tree1[node]=val;
tree2[node]=val;
return;
}
int mid=(a+b)/2;
update(a,mid,2*node,pos,val);
update(mid+1,b,2*node+1,pos,val);
tree1[node]=Max(tree1[2*node],tree1[2*node+1]);
tree2[node]=Min(tree2[2*node],tree2[2*node+1]);
}
lld QMax(int a, int b, int node, int x, int y){
if(b<x || y<a)return -1;
if(x<=a && b<=y)return tree1[node];
int mid=(a+b)/2;
return Max(QMax(a,mid,2*node,x,y),QMax(mid+1,b,2*node+1,x,y));
}
lld QMin(int a, int b, int node, int x, int y){
if(b<x || y<a)return -1;
if(x<=a && b<=y)return tree2[node];
int mid=(a+b)/2;
return Min(QMin(a,mid,2*node,x,y),QMin(mid+1,b,2*node+1,x,y));
}
};
int main(){
scanf("%d",&n);
rep(i,0,n){
scanf("%lld %lld %lld",&h[i],&a[i],&b[i]);
}
if(n<=2000){
ST *S=new ST();
rep(i,1,n+1){
S->build(1,n,1);
vector<pii> v;
rep(j,i,n+1){
v.push_back(pii(j+a[j-1],j));
v.push_back(pii(j+b[j-1]+1,-j));
}
sort(v.begin(),v.end());
int ptr=0;
lld ans=-1;
//cout<<i<<endl;
rep(j,i,n+1){
while(ptr<v.size() && v[ptr].first<=j){
//cout<<"U"<<v[ptr].second<<" "<<v[ptr].first<<endl;
if(v[ptr].second>0){
S->update(1,n,1,v[ptr].second,h[v[ptr].second-1]);
}else{
S->update(1,n,1,-v[ptr].second,-1);
}
ptr++;
}
lld m,M;
m=S->QMin(1,n,1,j-b[j-1],j-a[j-1]);
M=S->QMax(1,n,1,j-b[j-1],j-a[j-1]);
//cout<<m<<" "<<M<<endl;
if(m!=-1)ans=max(ans,h[j-1]-m);
if(M!=-1)ans=max(ans,M-h[j-1]);
answer[i][j]=ans;
//cout<<"A"<<answer[i][j]<<" "<<i<<" "<<j<<endl;
}
}
int q;
scanf("%d",&q);
while(q--){
//cout<<"A"<<endl;
int l,r;
scanf("%d %d",&l,&r);
printf("%lld\n",answer[l][r]);
}
return 0;
}
ST *S=new ST();
int q;
scanf("%d",&q);
while(q--){
int l,r;
scanf("%d %d",&l,&r);
S->build(1,n,1);
vector<pii> v;
rep(i,l,r+1){
v.push_back(pii(i+a[i-1],i));
v.push_back(pii(i+b[i-1]+1,-i));
}
sort(v.begin(),v.end());
int ptr=0;
lld ans=-1;
rep(i,l,r+1){
while(ptr<v.size() && v[ptr].first<=i){
if(v[ptr].second>0){
S->update(1,n,1,v[ptr].second,h[v[ptr].second-1]);
}else{
S->update(1,n,1,-v[ptr].second,-1);
}
ptr++;
}
lld m,M;
m=S->QMin(1,n,1,i-b[i-1],i-a[i-1]);
M=S->QMax(1,n,1,i-b[i-1],i-a[i-1]);
//cout<<m<<" "<<M<<endl;
if(m!=-1)ans=max(ans,h[i-1]-m);
if(M!=-1)ans=max(ans,M-h[i-1]);
}
printf("%lld\n",ans);
}
return 0;
}
