#pragma GCC optimize("O3,unroll-loops")
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const int mx = 6001;

int main(){
	int na, nb, nc; cin >> na >> nb >> nc;


	vector<ll> acl(mx+1), bcl(mx+1), ccl(mx+1);
	vector<ll> acr(mx+1), bcr(mx+1), ccr(mx+1);
	vector<ll> asl(mx+1), bsl(mx+1), csl(mx+1);
	vector<ll> asr(mx+1), bsr(mx+1), csr(mx+1);
	
	for (int i=0; i<na; i++){
		int x; cin >> x;
		acl[x+3000]++;
		acr[x+3000+1]++;
		asl[x+3000]+=x;
		asr[x+3000+1]+=x;
	}

	for (int i=0; i<nb; i++){
		int x; cin >> x;
		bcl[x+3000]++;
		bcr[x+3000+1]++;
		bsl[x+3000]+=x;
		bsr[x+3000+1]+=x;
	}

	for (int i=0; i<nc; i++){
		int x; cin >> x;
		ccl[x+3000]++;
		ccr[x+3000+1]++;
		csl[x+3000]+=x;
		csr[x+3000+1]+=x;
	}

	for (int i=mx; i>=0; i--){
		asl[i] += asl[i+1];
		bsl[i] += bsl[i+1];
		csl[i] += csl[i+1];
		acl[i] += acl[i+1];
		bcl[i] += bcl[i+1];
		ccl[i] += ccl[i+1];
	}

	for (int i=0; i<=mx; i++){
		asr[i+1] += asr[i];
		bsr[i+1] += bsr[i];
		csr[i+1] += csr[i];
		acr[i+1] += acr[i];
		bcr[i+1] += bcr[i];
		ccr[i+1] += ccr[i];
	}

	ll ans = 0;
	auto calc = [&](int i, int j, bool ix, bool jx){
		int asz, bsz, csz;
		ll asum, bsum, csum;
		if (!ix){
			asz = acl[i];
			asum = asl[i];
		}else{
			asz = acr[i];
			asum = asr[i];
		}
		if (!jx){
			bsz = bcl[j];
			bsum = bsl[j];
		}else{
			bsz = bcr[j];
			bsum = bsr[j];
		}
		if (asz == 0){
			csz = ccl[0];
			csum = csl[0];
			ans = max(ans, asum * bsz + bsum * csz + csum * asz);
			csz = ccl[mx];
			csum = csl[mx];
			ans = max(ans, asum * bsz + bsum * csz + csum * asz);
		}else{
			ll t = (- bsum + asz - 1 + abs(bsum) * asz) / asz - abs(bsum);
			t = min(t, (ll)3000);
			t = max(t, (ll)-3000);
			csz = ccl[t+3000];
			csum = csl[t+3000];
			ans = max(ans, asum * bsz + bsum * csz + csum * asz);
			csz = ccl[t+3001];
			csum = csl[t+3001];
			ans = max(ans, asum * bsz + bsum * csz + csum * asz);
			csz = ccl[max((ll)0, t+3001)];
			csum = csl[max((ll)0, t+3001)];
			ans = max(ans, asum * bsz + bsum * csz + csum * asz);
		}
	};

	for (int i=0; i<=mx; i++){
		for (int j=0; j<=mx; j++){
			calc(i,j,0,0);
		}
	}

	cout << ans << '\n';
}