#pragma GCC optimize ("Ofast")
#include<bits/stdc++.h>
using namespace std;
void*wmem;
char memarr[96000000];
template<class T> inline void walloc1d(T **arr, int x, void **mem = &wmem){
  static int skip[16] = {0, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1};
  (*mem) = (void*)( ((char*)(*mem)) + skip[((unsigned long long)(*mem)) & 15] );
  (*arr)=(T*)(*mem);
  (*mem)=((*arr)+x);
}
template<class T> inline void walloc1d(T **arr, int x1, int x2, void **mem = &wmem){
  walloc1d(arr, x2-x1, mem);
  (*arr) -= x1;
}
void sortF_L(int N, unsigned A[], void *mem = wmem){
  int i;
  int m;
  int bt;
  unsigned*arr;
  unsigned c;
  int*sz;
  if(N < 256){
    sort(A, A+N);
    return;
  }
  bt = sizeof(unsigned) * 8;
  walloc1d(&arr, N, &mem);
  walloc1d(&sz, N, &mem);
  for(m=0;m<bt;m+=8){
    for(i=(0);i<(257);i++){
      sz[i] = 0;
    }
    for(i=(0);i<(N);i++){
      sz[ 1+((A[i]>>m)&255u) ]++;
    }
    for(i=(1);i<(257);i++){
      sz[i] += sz[i-1];
    }
    for(i=(0);i<(N);i++){
      c = ((A[i]>>m)&255u);
      arr[sz[c]++] = A[i];
    }
    swap(A, arr);
  }
}
void sortF_L(int N, int A[], void *mem = wmem){
  int i;
  int x;
  int y;
  int z;
  int*arr;
  unsigned*send;
  if(N < 256){
    sort(A, A+N);
    return;
  }
  send = (unsigned*)A;
  sortF_L(N, send, mem);
  if(A[0] < 0 || A[N-1] >= 0){
    return;
  }
  x = 0;
  y = N;
  while(x < y){
    z = (x+y) / 2;
    if(A[z] < 0){
      y = z;
    }
    else{
      x = z+1;
    }
  }
  walloc1d(&arr, N, &mem);
  z = 0;
  for(i=(x);i<(N);i++){
    arr[z++] = A[i];
  }
  for(i=(0);i<(x);i++){
    arr[z++] = A[i];
  }
  for(i=(0);i<(N);i++){
    A[i] = arr[i];
  }
}
void sortF_L(int N, unsigned long long A[], void *mem = wmem){
  int i;
  int m;
  int bt;
  unsigned long long*arr;
  unsigned c;
  int*sz;
  if(N < 512){
    sort(A, A+N);
    return;
  }
  bt = sizeof(unsigned long long) * 8;
  walloc1d(&arr, N, &mem);
  walloc1d(&sz, N, &mem);
  for(m=0;m<bt;m+=8){
    for(i=(0);i<(257);i++){
      sz[i] = 0;
    }
    for(i=(0);i<(N);i++){
      sz[ 1+((A[i]>>m)&255u) ]++;
    }
    for(i=(1);i<(257);i++){
      sz[i] += sz[i-1];
    }
    for(i=(0);i<(N);i++){
      c = ((A[i]>>m)&255u);
      arr[sz[c]++] = A[i];
    }
    swap(A, arr);
  }
}
void sortF_L(int N, long long A[], void *mem = wmem){
  int i;
  int x;
  int y;
  int z;
  long long*arr;
  unsigned long long*send;
  if(N < 512){
    sort(A, A+N);
    return;
  }
  send = (unsigned long long*)A;
  sortF_L(N, send, mem);
  if(A[0] < 0 || A[N-1] >= 0){
    return;
  }
  x = 0;
  y = N;
  while(x < y){
    z = (x+y) / 2;
    if(A[z] < 0){
      y = z;
    }
    else{
      x = z+1;
    }
  }
  walloc1d(&arr, N, &mem);
  z = 0;
  for(i=(x);i<(N);i++){
    arr[z++] = A[i];
  }
  for(i=(0);i<(x);i++){
    arr[z++] = A[i];
  }
  for(i=(0);i<(N);i++){
    A[i] = arr[i];
  }
}
inline int my_getchar_unlocked(){
  static char buf[1048576];
  static int s = 1048576;
  static int e = 1048576;
  if(s == e && e == 1048576){
    e = fread_unlocked(buf, 1, 1048576, stdin);
    s = 0;
  }
  if(s == e){
    return EOF;
  }
  return buf[s++];
}
inline void rd(int &x){
  int k;
  int m=0;
  x=0;
  for(;;){
    k = my_getchar_unlocked();
    if(k=='-'){
      m=1;
      break;
    }
    if('0'<=k&&k<='9'){
      x=k-'0';
      break;
    }
  }
  for(;;){
    k = my_getchar_unlocked();
    if(k<'0'||k>'9'){
      break;
    }
    x=x*10+k-'0';
  }
  if(m){
    x=-x;
  }
}
struct MY_WRITER{
  char buf[1048576];
  int s;
  int e;
  MY_WRITER(){
    s = 0;
    e = 1048576;
  }
  ~MY_WRITER(){
    if(s){
      fwrite_unlocked(buf, 1, s, stdout);
    }
  }
}
;
MY_WRITER MY_WRITER_VAR;
void my_putchar_unlocked(int a){
  if(MY_WRITER_VAR.s == MY_WRITER_VAR.e){
    fwrite_unlocked(MY_WRITER_VAR.buf, 1, MY_WRITER_VAR.s, stdout);
    MY_WRITER_VAR.s = 0;
  }
  MY_WRITER_VAR.buf[MY_WRITER_VAR.s++] = a;
}
inline void wt_L(char a){
  my_putchar_unlocked(a);
}
inline void wt_L(long long x){
  int s=0;
  int m=0;
  char f[20];
  if(x<0){
    m=1;
    x=-x;
  }
  while(x){
    f[s++]=x%10;
    x/=10;
  }
  if(!s){
    f[s++]=0;
  }
  if(m){
    my_putchar_unlocked('-');
  }
  while(s--){
    my_putchar_unlocked(f[s]+'0');
  }
}
template<class T> int coordcomp_L(int n, T arr[], int res[] = NULL, void *mem = wmem){
  int i;
  int k = 0;
  pair<T,int>*r;
  walloc1d(&r, n, &mem);
  for(i=(0);i<(n);i++){
    r[i].first = arr[i];
    r[i].second = i;
  }
  sort(r, r+n);
  if(res != NULL){
    for(i=(0);i<(n);i++){
      if(i && r[i].first != r[i-1].first){
        k++;
      }
      res[r[i].second] = k;
    }
  }
  else{
    for(i=(0);i<(n);i++){
      if(i && r[i].first != r[i-1].first){
        k++;
      }
      arr[r[i].second] = k;
    }
  }
  return k+1;
}
template<class T> int coordcomp_L(int n1, T arr1[], int n2, T arr2[], int res1[] = NULL, int res2[] = NULL, void *mem = wmem){
  int i;
  int k = 0;
  pair<T,int>*r;
  walloc1d(&r, n1+n2, &mem);
  for(i=(0);i<(n1);i++){
    r[i].first = arr1[i];
    r[i].second = i;
  }
  for(i=(0);i<(n2);i++){
    r[n1+i].first = arr2[i];
    r[n1+i].second = n1+i;
  }
  sort(r, r+n1+n2);
  for(i=(0);i<(n1+n2);i++){
    if(i && r[i].first != r[i-1].first){
      k++;
    }
    if(r[i].second < n1){
      if(res1!=NULL){
        res1[r[i].second] = k;
      }
      else{
        arr1[r[i].second] = k;
      }
    }
    else{
      if(res2!=NULL){
        res2[r[i].second-n1] = k;
      }
      else{
        arr2[r[i].second-n1] = k;
      }
    }
  }
  return k+1;
}
template<class T> struct fenwick{
  int size;
  int memory;
  T*data;
  void malloc(int mem);
  void malloc(int mem, int fg);
  void walloc(int mem, void **workMemory = &wmem);
  void walloc(int mem, int fg, void **workMemory = &wmem);
  void free(void);
  void init(int N);
  void add(int k, T val);
  T get(int k);
  T range(int a, int b);
  int kth(T k);
}
;
int N;
int A[100000];
int B[100000];
fenwick<int> f;
int main(){
  int i;
  wmem = memarr;
  long long res = 0;
  rd(N);
  {
    int Lj4PdHRW;
    for(Lj4PdHRW=(0);Lj4PdHRW<(N);Lj4PdHRW++){
      rd(A[Lj4PdHRW]);
    }
  }
  {
    int e98WHCEY;
    for(e98WHCEY=(0);e98WHCEY<(N);e98WHCEY++){
      rd(B[e98WHCEY]);
    }
  }
  int sz =coordcomp_L(N,A,N,B);
  f.walloc(sz, 1);
  sortF_L(N,A);
  for(i=(0);i<(N);i++){
    f.add(B[i],1);
    res += f.get(A[i]-1);
  }
  wt_L(res);
  wt_L('\n');
  return 0;
}
template<class T> void fenwick<T>::malloc(int mem){
  memory = mem;
  data = (T*)std::malloc(sizeof(T)*mem);
}
template<class T> void fenwick<T>::malloc(int mem, int fg){
  memory = mem;
  data = (T*)std::malloc(sizeof(T)*mem);
  if(fg){
    init(mem);
  }
}
template<class T> void fenwick<T>::walloc(int mem, void **workMemory /* = &wmem*/){
  memory = mem;
  walloc1d(&data, mem, workMemory);
}
template<class T> void fenwick<T>::walloc(int mem, int fg, void **workMemory /* = &wmem*/){
  memory = mem;
  walloc1d(&data, mem, workMemory);
  if(fg){
    init(mem);
  }
}
template<class T> void fenwick<T>::free(void){
  memory = 0;
  free(data);
}
template<class T> void fenwick<T>::init(int N){
  size = N;
  memset(data,0,sizeof(T)*N);
}
template<class T> void fenwick<T>::add(int k, T val){
  while(k < size){
    data[k] += val;
    k |= k+1;
  }
}
template<class T> T fenwick<T>::get(int k){
  T res = 0;
  while(k>=0){
    res += data[k];
    k = (k&(k+1))-1;
  }
  return res;
}
template<class T> T fenwick<T>::range(int a, int b){
  if(b==-1){
    b=size-1;
  }
  return get(b) - get(a-1);
}
template<class T> int fenwick<T>::kth(T k){
  int i=0;
  int j=size;
  int c;
  T v;
  while(i<j){
    c = (i+j)/2;
    v = get(c);
    if(v <= k){
      i=c+1;
    }
    else{
      j=c;
    }
  }
  return i==size?-1:i;
}
// cLay varsion 20201115-1

// --- original code ---
// int N, A[1d5], B[1d5];
// fenwick<int> f;
// {
//   ll res = 0;
//   rd(N,A(N),B(N));
//   int sz = coordcomp(N,A,N,B);
//   f.walloc(sz, 1);
//   sortF(N,A);
//   rep(i,N){
//     f.add(B[i],1);
//     res += f.get(A[i]-1);
//   }
//   wt(res);
// }