Binge watching

n = int(input())
l = [[int(i) for i in input().split()] for _ in range(n)]
l.sort(key=lambda x:x[1])
c = 0
m = 0
for s,e in l:
  if s >= c:
    m+=1
    c=e
print(m)

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED