[python] 백준 1931 회의실 배정

https://www.acmicpc.net/problem/1931

1931번: 회의실 배정

n = int(input())
data = []
for i in range(n):
    data.append(list(map(int, input().split())))
data.sort(key = lambda x:(x[1], x[0]))

now = 0
result = 0
for start, end in data:
    if start >= now:
        result += 1
        now = end
print(result)