Binge watching

n = int(input())

l_start = []
l_end = []
l = [] #end, start
for i in range(n):
    a, b = input().split()
    l.append((int(b),int(a)))

l.sort()
# print(l)
end_t = 0
count = 0
for elem in l:
    if elem[1] >= end_t:
        count += 1
        end_t = elem[0]

print(count)

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