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Abhishek Chaudhary

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# Maximum Population Year

You are given a 2D integer array `logs` where each `logs[i] = [birthi, deathi]` indicates the birth and death years of the `ith` person.

The population of some year `x` is the number of people alive during that year. The `ith` person is counted in year `x`'s population if `x` is in the inclusive range `[birthi, deathi - 1]`. Note that the person is not counted in the year that they die.

Return the earliest year with the maximum population.

Example 1:

Input: logs = [[1993,1999],[2000,2010]]
Output: 1993
Explanation: The maximum population is 1, and 1993 is the earliest year with this population.

Example 2:

Input: logs = [[1950,1961],[1960,1971],[1970,1981]]
Output: 1960
Explanation:
The maximum population is 2, and it had happened in years 1960 and 1970.
The earlier year between them is 1960.

Constraints:

• `1 <= logs.length <= 100`
• `1950 <= birthi < deathi <= 2050`

SOLUTION:

``````import bisect

class Solution:
def maximumPopulation(self, logs: List[List[int]]) -> int:
pops = []
for b, d in logs:
bisect.insort(pops, (b, 1))
bisect.insort(pops, (d, -1))
mpop = 0
mpopyear = None
curr = 0
for year, p in pops:
curr += p
if curr > mpop:
mpop = curr
mpopyear = year
return mpopyear
``````