// yukicoder: No.743 Segments on a Polygon
// 2019.5.15 bal4u

#include <stdio.h>
#include <stdlib.h>

#if 1
#define gc() getchar_unlocked()
#else
#define gc() getchar()
#endif
int in()
{
	int n = 0, c = gc();
	do n = 10*n + (c & 0xf), c = gc(); while (c >= '0');
	return n;
}

// Bit木 library
#define MAX 200005
int bit[MAX]; int n;
long long sum(int i) {
	long long s = 0;
	while (i > 0) s += bit[i], i -= i & -i;
	return s;
}

void add(int i) {
	while (i <= n) bit[i]++, i += i & -i;
}

int f[MAX];

int main()
{
	int i, N, M, a, b;
	long long ans;
	
	N = in(), M = in();
	for (i = 0; i < N; i++) {
		a = in(), b = in();
		if (a < b) f[a] = b;
		else       f[b] = a;
	}
	
	// bit木で集計
	n = M, ans = 0;
	for (i = 0; i < M; i++) if (f[i]) {
		ans += sum(f[i]) - sum(i);
		add(f[i]);
	}
	printf("%lld\n", ans);
	return 0;
}