#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,y,a[25001],b[25001];
long long ans;
int main(){
n=read();x=read();y=read();
for(int i=1;i<=n;i++)
a[i]=read(),b[i]=read();
sort(a+1,a+n+1);
sort(b+1,b+n+1);
for(int i=1;i<......
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