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

int main() {
  int n;
  cin>>n;
  vector<int> ch(n+1);
  ch[0]=ch[n]=1;
  for (int i=0;i<2;i++) {
    int m;
    cin>>m;
    int sum=0;
    for (int j=0;j<m;j++) {
      int a;
      cin>>a;
      sum+=a;
      ch[(i==0?sum:n-sum)]=1;
    }
  }
  cout<<n+1-accumulate(ch.begin(),ch.end(),0)<<endl;
}