- Python Basic Tutorial
- Python - Home
- Python - Overview
- Python - Environment Setup
- Python - Basic Syntax
- Python - Comments
- Python - Variables
- Python - Data Types
- Python - Operators
- Python - Decision Making
- Python - Loops
- Python - Numbers
- Python - Strings
- Python - Lists
- Python - Tuples
- Python - Dictionary
- Python - Date & Time
- Python - Functions
- Python - Modules
- Python - Files I/O
- Python - Exceptions

# Program to find length of contiguous strictly increasing sublist in Python

Suppose we have a list of numbers called nums, we have to find the maximum length of a contiguous strictly increasing sublist when we can remove one or zero elements from the list.

So, if the input is like nums = [30, 11, 12, 13, 14, 15, 18, 17, 32], then the output will be 7, as when we remove 18 in the list we can get [11, 12, 13, 14, 15, 17, 32] which is the longest, contiguous, strictly increasing sublist, and its length is 7.

To solve this, we will follow these steps−

n := size of nums

pre := a list of size n and fill with 1s

for i in range 1 to n - 1, do

if nums[i] > nums[i - 1], then

pre[i] := pre[i - 1] + 1

suff := a list of size n and fill with 1s

for i in range n - 2 to -1, decrease by 1, do

if nums[i] < nums[i + 1], then

suff[i] := suff[i + 1] + 1

ans := maximum value of maximum of pre and maximum of suff

for i in range 1 to n - 1, do

if nums[i - 1] < nums[i + 1], then

ans := maximum of ans and (pre[i - 1] + suff[i + 1])

return ans

Let us see the following implementation to get better understanding −

## Example

class Solution: def solve(self, nums): n = len(nums) pre = [1] * n for i in range(1, n - 1): if nums[i] > nums[i - 1]: pre[i] = pre[i - 1] + 1 suff = [1] * n for i in range(n - 2, -1, -1): if nums[i] < nums[i + 1]: suff[i] = suff[i + 1] + 1 ans = max(max(pre), max(suff)) for i in range(1, n - 1): if nums[i - 1] < nums[i + 1]: ans = max(ans, pre[i - 1] + suff[i + 1]) return ans ob = Solution() nums = [30, 11, 12, 13, 14, 15, 18, 17, 32] print(ob.solve(nums))

## Input

[30, 11, 12, 13, 14, 15, 18, 17, 32]

## Output

7

- Related Articles
- Program to find length of longest strictly increasing then decreasing sublist in Python
- Program to find length of longest contiguously strictly increasing sublist after removal in Python
- Program to find length of longest contiguous sublist with same first letter words in Python
- Program to find sum of contiguous sublist with maximum sum in Python
- Program to find length of longest distinct sublist in Python
- Program to check whether list is strictly increasing or strictly decreasing in Python
- Program to find number of strictly increasing colorful candle sequences are there in Python
- Program to find minimum number of operations required to make lists strictly Increasing in python
- Program to find length of longest increasing subsequence in Python
- Program to find length of longest alternating inequality elements sublist in Python
- Program to find length of longest sublist with given condition in Python
- Find groups of strictly increasing numbers in a list in Python
- Program to find length of longest circular increasing subsequence in python
- Program to find length of longest consecutively increasing substring in Python
- Program to find length of longest sublist whose sum is 0 in Python