简单的线段树加分类讨论。

#include<bits/stdc++.h>
using namespace std;
const int N=1e5+5;
int n,m,a[N],w[N],l[N],r[N];
int get1(int x){
	return lower_bound(a+1,a+n+1,x)-a;
}
int get2(int x){
	return lower_bound(a+1,a+n+1,x)-a-1;
}
struct trnode{
	int l,r,lc,rc,mx;
}tr[2*N];
int trlen;
void pushup(int now,int lc,int rc){
	tr[now].mx=max(tr[lc].mx,tr[rc].mx);
}
void build(int nl,int nr){
	trlen++;int now=trlen;
	tr[now]=trnode{nl,nr,-1,-1,0};
	if(nl==nr)tr[now].mx=w[nl];
	else{
		int mid=(nl+nr)>>1;
		tr[now].lc=trlen+1;build(nl,mid);
		tr[now].rc=trlen+1;build(mid+1,nr);
		pushup(now,tr[now].lc,tr[now].rc);
	}
}
int query(int now,int nl,int nr,int l,int r){
	if(l>r)return 0;
	if(l<=nl&&nr<=r){
		return tr[now].mx;
	}
	int mid=(nl+nr)>>1;
	int lc=tr[now].lc,rc=tr[now].rc;
	int res=0;
	if(l<=mid)res=max(res,query(lc,nl,mid,l,r));
	if(mid<r)res=max(res,query(rc,mid+1,nr,l,r));
	return res;
}
int main(){
	scanf("%d",&n);
	for(int i=1;i<=n;i++){
		scanf("%d%d",&a[i],&w[i]);
	}
	scanf("%d",&m);
	for(int i=1;i<=m;i++){
		scanf("%d%d",&l[i],&r[i]);
	}
	build(1,n);
	for(int i=1;i<=m;i++){
		int L=get1(l[i]),R=get2(r[i]);
		if(a[L]==l[i]){
			int res=query(1,1,n,L+1,R);
			if(a[R+1]==r[i]){
				int bk=((R+1-L)==(r[i]-l[i]));
				if(bk&&res<w[R+1]&&w[R+1]<=w[L]){
					puts("true");
				}
				else if(!bk&&res<w[R+1]&&w[R+1]<=w[L]){
					puts("maybe");
				}
				else puts("false");
			}
			else{
				if(res>=w[L]){
					puts("false");
				}
				else puts("maybe");
			}
		}
		else{
			int res=query(1,1,n,L,R);
			if(a[R+1]==r[i]){
				if(res<w[R+1]){
					puts("maybe");
				}
				else puts("false");
			}
			else puts("maybe");
		}
	}
	return 0;
}

#include<bits/stdc++.h>
#define il inline
#define lson l,m,rt<<1
#define rson m+1,r,rt<<1|1
#define For(i,a,b) for(int (i)=(a);(i)<=(b);(i)++)
#define Max(a,b) ((a)>(b)?(a):(b))
using namespace std;
const int N=200005;
int n,m,num[N],ls[N],rs[N];
int ye[N],co[N];
bool f[N];
struct node{
    int ans,f;
};

il int gi(){
    int a=0;char x=getchar();bool f=0;
    while((x<'0'||x>'9')&&x!='-')x=getchar();
    if(x=='-')x=getchar(),f=1;
    while(x>='0'&&x<='9')a=(a<<3)+(a<<1)+x-48,x=getchar();
    return f?-a:a;
}

il void pushup(int rt){
    if(rs[rt<<1]==ls[rt<<1|1]-1)f[rt]=f[rt<<1]&f[rt<<1|1];
    rs[rt]=rs[rt<<1|1];ls[rt]=ls[rt<<1];
    num[rt]=Max(num[rt<<1],num[rt<<1|1]);
}

il void build(int l,int r,int rt){
    if(l==r){rs[rt]=ls[rt]=ye[l],num[rt]=co[l],f[rt]=1;return;}
    int m=l+r>>1;
    build(lson),build(rson);
    pushup(rt);
}

il node query(int L,int R,int l,int r,int rt){
    if(L<=l&&R>=r){
        node tmp;
        tmp.ans=num[rt],tmp.f=f[rt];
        return tmp;
    }
    int m=l+r>>1;
    node tmp;
    tmp.ans=0,tmp.f=1;
    if(L<=m){
        node x=query(L,R,lson);
        tmp.ans=Max(tmp.ans,x.ans);
        tmp.f&=x.f;
    }
    if(R>m){
        node x=query(L,R,rson);
        tmp.ans=Max(tmp.ans,x.ans);
        tmp.f&=x.f;
    }
    return tmp;
}

int main(){
    n=gi();
    For(i,1,n)ye[i]=gi(),co[i]=gi();
    build(1,n,1);
    m=gi();
    int x,y;
    while(m--){
        x=gi(),y=gi();
        if(x>=y){printf("false\n");continue;}
        int st=lower_bound(ye+1,ye+n+1,x)-ye,ed=lower_bound(ye+1,ye+n+1,y)-ye;
        bool fl,fr;int op=0;
        fl=ye[st]==x,fr=ye[ed]==y;
        if(!fl)st--;
        if(st+1<=ed-1)op=query(st+1,ed-1,1,n,1).ans;
        if((op>=co[ed]&&fr)||(co[st]<co[ed]&&fl&&fr)||(op>=co[st]&&fl))printf("false\n");
        else if(ed-st!=ye[ed]-ye[st]||!fr||!fl)printf("maybe\n");
        else printf("true\n");
    }
    return 0;
}