import std.algorithm, std.container, std.conv, std.math, std.range, std.typecons, std.stdio, std.string;

auto rdsp(){return readln.splitter;}
void pick(R,T)(ref R r,ref T t){t=r.front.to!T;r.popFront;}
void readV(T...)(ref T t){auto r=rdsp;foreach(ref v;t)pick(r,v);}
void readS(T)(size_t n,ref T t){t=new T(n);foreach(ref v;t){auto r=rdsp;foreach(ref j;v.tupleof)pick(r,j);}}

void main()
{
  struct E { int a, b; }
  int n, m; readV(n, m);
  E[] e; readS(n, e);

  foreach (ref ei; e)
    if (ei.a > ei.b) swap(ei.a, ei.b);

  e.sort!"a.a < b.a";

  auto ft = new FenwickTree!int(m), r = 0L;
  foreach (ei; e) {
    r += ft[ei.a..ei.b];
    ++ft[ei.b];
  }

  writeln(r);
}

class FenwickTree(T)
{
  const size_t n;
  T[] buf;

  this(size_t n)
  {
    this.n = n;
    this.buf = new T[](n+1);
  }

  void opIndexOpAssign(string op)(T val, size_t i) if (op == "+" || op == "-")
  {
    ++i;
    for (; i <= n; i += i & -i) mixin("buf[i] " ~ op ~ "= val;");
  }

  void opIndexUnary(string op)(size_t i) if (op == "++" || op == "--")
  {
    ++i;
    for (; i <= n; i += i & -i) mixin("buf[i]" ~ op ~ ";");
  }

  pure T opSlice(size_t r, size_t l) { return get(l) - get(r); }
  pure T opIndex(size_t i) { return opSlice(i, i+1); }
  pure size_t opDollar() { return n; }

private:

  pure T get(size_t i)
  {
    auto s = T(0);
    for (; i > 0; i -= i & -i) s += buf[i];
    return s;
  }
}