#include<algorithm>
#include<iostream>
#include<cstdio>
using namespace std;
inline int read(){
int x=0,f=1;char ch=getchar();
while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
while(ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();}
return x*f;
}
int n,x[100001],y[100001];
int doit(int a[],int b[]){
int al=1,ar=n,bl=1,br=n,ans=0;
while(al<=ar&&bl<=br){
if(a[al]>b[bl]){ans+=2;al++;bl++;}
else if(a[ar]&......
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