import sys
read=sys.stdin.buffer.read
readline=sys.stdin.buffer.readline
readlines=sys.stdin.buffer.readlines

n, k=map(int, readline().split())
spu=list(map(int, read().split()))
s=spu[::3]
p=spu[1::3]
u=spu[2::3]
num=[0]*n
v=[[] for _ in range(100001)]
for i, x in enumerate(u):
    v[x].append(i)
for x in range(100001):
    if v[x]:
        v[x].sort(key=lambda i: -s[i]*(10**7)+p[i])
        for j, i in enumerate(v[x]):
            num[i]=j
q=[(-s[i], num[i], p[i], i) for i in range(n)]
q.sort()
for i in range(k):
    print(q[i][3])