题解 | 分数线划定

n,m = map(int,input().split())
t = (3 * m) // 2
d = {}
score=[]
for _ in range(n):
    k,s = map(int,input().split())
    d[k] = s
    score.append(s)
score.sort(reverse = True)
d_sorted = dict(sorted(d.items(), key=lambda x: (-x[1], x[0])))
line = score[t-1]
cnt = 0
for i in score:
    if i>=line:
        cnt+=1
print(f"{line} {cnt}")
for k,v in d_sorted.items():
    if d_sorted[k]>=line:
        print(f"{k} {v}")