Python map function to find row with maximum number of 1's Last Updated : 28 Jul, 2022 Comments Improve Suggest changes 2 Likes Like Report Given a boolean 2D array, where each row is sorted. Find the row with the maximum number of 1s. Examples: Input: matrix = [[0, 1, 1, 1], [0, 0, 1, 1], [1, 1, 1, 1], [0, 0, 0, 0]] Output: 2 We have existing solution for this problem please refer Find the row with maximum number of 1's. We can solve this problem in python quickly using map() function. Approach is very simple, find sum of all 1's in each row and then print index of maximum sum in a list because row having maximum 1 will also have maximum sum. Implementation: Python3 # Function to find the row with maximum number of 1's def maxOnes(input): # map sum function on each row of # given matrix # it will return list of sum of all one's # in each row, then find index of maximum element result = list(map(sum,input)) print (result.index(max(result))) # Driver program if __name__ == "__main__": input = [[0, 1, 1, 1],[0, 0, 1, 1],[1, 1, 1, 1],[0, 0, 0, 0]] maxOnes(input) Output2 Complexity : O(M*N) Create Quiz Comment S Shashank Mishra Follow 2 Improve S Shashank Mishra Follow 2 Improve Article Tags : Python python-list Explore Python FundamentalsPython Introduction 2 min read Input and Output in Python 4 min read Python Variables 4 min read Python Operators 4 min read Python Keywords 2 min read Python Data Types 8 min read Conditional Statements in Python 3 min read Loops in Python - For, While and Nested Loops 5 min read Python Functions 5 min read Recursion in Python 4 min read Python Lambda Functions 5 min read Python Data StructuresPython String 5 min read Python Lists 4 min read Python Tuples 4 min read Python Dictionary 3 min read Python Sets 6 min read Python Arrays 7 min read List Comprehension in Python 4 min read Advanced PythonPython OOP Concepts 11 min read Python Exception Handling 5 min read File Handling in Python 4 min read Python Database Tutorial 4 min read Python MongoDB Tutorial 3 min read Python MySQL 9 min read Python Packages 10 min read Python Modules 3 min read Python DSA Libraries 15 min read List of Python GUI Library and Packages 3 min read Data Science with PythonNumPy Tutorial - Python Library 3 min read Pandas Tutorial 4 min read Matplotlib Tutorial 5 min read Python Seaborn Tutorial 3 min read StatsModel Library - Tutorial 3 min read Learning Model Building in Scikit-learn 6 min read TensorFlow Tutorial 2 min read PyTorch Tutorial 6 min read Web Development with PythonFlask Tutorial 8 min read Django Tutorial | Learn Django Framework 7 min read Django ORM - Inserting, Updating & Deleting Data 4 min read Templating With Jinja2 in Flask 6 min read Django Templates 5 min read Build a REST API using Flask - Python 3 min read Building a Simple API with Django REST Framework 3 min read Python PracticePython Quiz 1 min read Python Coding Practice 1 min read Python Interview Questions and Answers 15+ min read Like