#include<bits/stdc++.h>
using namespace std;

int main(){
  int inf=1e9;
  int n,m,l;
  cin>>n>>m>>l;
  vector<int> a(n),b(m);
  for (int i=0;i<n;i++) cin>>a[i];
  for (int i=0;i<m;i++) cin>>b[i];
  sort(a.begin(),a.end());
  sort(b.begin(),b.end());
  vector<vector<int>> dp(n+1,vector<int>(m+1));
  for (int t=1;t<=l;t++){
    for (int i=n;i>=t;i--) for (int j=m;j>=t;j--){
      dp[i][j]=dp[i-1][j-1]+abs(a[i-1]-b[j-1]);
    }
    for (int i=t-1;i<t;i++) for (int j=0;j<=m;j++) dp[i][j]=inf;
    for (int i=0;i<=n;i++) for (int j=t-1;j<t;j++) dp[i][j]=inf;
    for (int i=t;i<=n;i++) for (int j=t;j<=m;j++){
      dp[i][j]=min({dp[i][j],dp[i-1][j],dp[i][j-1]});
    }
  }
  cout<<dp[n][m]<<endl;
}