#include<bits/stdc++.h>
using namespace std;
#define ll long long
inline ll read(){
	ll x=0,f=1;
	char c=getchar();
	while(c<'0'||c>'9'){
		if(c=='-')f=-1;
		c=getchar();
	}
	while(c>='0'&&c<='9'){
		x=x*10+c-'0';
		c=getchar();
	}
	return x*f;
}
ll n,m,p,ans;
int main(){
	freopen("navigat.in","r",stdin);
	freopen("navigat.out","w",stdout); 
	n=read(),m=read(),p=read();
	for(int i=1;i<=n+m;i++){
		ans=max(ans,read());
	}
	cout<<endl;
	return 0;
}