#include<iostream>
#include<vector>
#include<queue>
#include<stack>
#include<string>
#include<cmath>
#include<algorithm>
#include<bitset>
#include<map>
#include<functional>
#include<set>
#include<numeric>

#pragma region
using namespace std;
#define FOR(i,r,n) for(ll i = (ll)(r); i < (ll)(n); i++)
#define rep(i,n) FOR(i,0LL,n)
#define RFOR(i,r,n) for(ll i=(ll)(n-1);i>=r;i--)
#define rrep(i,n) RFOR(i,0LL,n)
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define COUNT(a,y,x) upper_bound(all(a), y) - lower_bound(all(a), x)
#define UNIQUE(a) sort(all(a)); a.erase(unique(all(a)), a.end())
#define SUM(a) accumulate(all(a),0LL)
#define scan(x) scanf("%lld",&x)
#define print(x) printf("%lld\n",x)
#define print2(x) printf("%lld ",x)
#define pb push_back
typedef long long int ll;
typedef vector<ll> vll;
typedef vector<vll> vvll;
typedef pair<ll, ll> pll;
typedef vector<pll> vpll;
typedef vector<string> vs;
typedef map<ll, ll> MAP;
const ll inf = 2222222222222222222LL;
const ll mod = 1000000007LL;

ll n = 0, m = 0, ans = 0, cnt = 0, tmp = 0, ma = -inf, mi = inf;
string s;
bool ok = true, flag = false;
ll dx[5] = { 1,-1,0,0,0 }, dy[5] = { 0,0,1,-1,0 };
ll ddx[9] = { 1,-1,0,0,1,1,-1,-1,0 }, ddy[9] = { 0,0,1,-1,1,-1,1,-1,0 };
#pragma endregion
#define MAX 111111

struct BinaryIndexed {
  ll num;
  vll bit;

  BinaryIndexed(ll x = MAX) {
	num = x;
	bit.resize(x + 1, 0);
  }

  ll sum(ll i) {
	ll ret = 0;
	while (i > 0) {
	  ret += bit[i];
	  i -= i & -i;
	}
	return ret;
  }

  void add(ll i, ll x) {
	if (i == 0) cout << "access 0 index" << endl;
	while (i <= num) {
	  bit[i] += x;
	  i += i & -i;
	}
  }
};

ll x[MAX * 2];

int main(void) {
  BinaryIndexed b;
  vpll v;
  cin >> n >> m;
  rep(i, n) {
	pll p;
	scan(tmp); p.first = tmp;
	scan(tmp); p.second = tmp;
	if (p.first > p.second) swap(p.first,p.second);
	v.pb(p);
  }
  sort(all(v));
  ll cur = 0;
  rep(i, n) {
	FOR(j, cur, v[i].first) if (x[j]) b.add(j, -1);
	ans += b.sum(v[i].second);
	b.add(v[i].second, 1);
	x[v[i].second]++;
	cur = v[i].first;
  }
  cout << ans << endl;

  return 0;
}