백준 1931 - 회의실 배정 (파이썬)

Answer

n = int(input())
t = [list(map(int, input().split())) for _ in range(n)]

t.sort(key = lambda x : x[0])
t.sort(key = lambda x : x[1])

last = 0
cnt = 0
for s, e in t:
    if s >= last:
        cnt += 1
        last = e

print(cnt)