又是题解，无博客Ganges

int no, score;

if (a.score != b.score) return a.score > b.score;
else return a.no < b.no;

//freopen("score.in", "r", stdin);
//freopen("score.out", "w", stdout);
scanf("%d%df", &n, &m);
for (int i = 1; i <= n; i++) scanf("%d%d", &a[i].no, &a[i].score);
sort(a + 1, a + n + 1, cmp);
m = m * 1.5;
int scoret = a[m].score;
int ans = 0;
for (int i = 1; i <= n; i++) {
	if (a[i].score >= scoret) { ans++; continue; }
	else break;
}
printf("%d %d\n", scoret, ans);
for (int i = 1; i <= ans; i++) printf("%d %d\n", a[i].no, a[i].score);
return 0;