LeetCode 74: Search A 2d Matrix — Step-by-Step Visual Trace

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Learn to solve LeetCode 74, a 2D matrix search problem, using a step-by-step visual trace approach with binary search

intermediate Published 9 Apr 2026

Action Steps

Read the problem statement carefully and understand the constraints
Visualize the 2D matrix and identify the target value to be searched
Apply binary search to the matrix by treating it as a 1D sorted array
Implement the solution in Python using a step-by-step approach
Test the solution with sample inputs to verify its correctness

Who Needs to Know This

This problem is relevant to software engineers, particularly those who work with algorithms and data structures, as it requires a deep understanding of binary search and matrix traversal

Key Insight

💡 Treat the 2D matrix as a 1D sorted array to apply binary search efficiently

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Title: LeetCode 74: Search A 2d Matrix — Step-by-Step Visual Trace

URL Source: https://dev.to/tracelit/leetcode-74-search-a-2d-matrix-step-by-step-visual-trace-3ahb

Published Time: 2026-04-09T06:47:30Z

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Posted on Apr 9 • Originally published at [tracelit.dev](https://tracelit.dev/blog/search-a-2d-matrix-visualization/)

# LeetCode 74: Search A 2d Matrix — Step-by-Step Visual Trace

[#leetcode](https://dev.to/t/leetcode)[#algorithms](https://dev.to/t/algorithms)[#python](https://dev.to/t/python)

**Medium** — Binary Search | Matrix | Array

## [](https://dev.to/tracelit/leetcode-74-search-a-2d-matrix-step-by-step-visual-trace-3ahb#the-problem) The Problem

Given a 2D matrix where each row is sorted in ascending order and the first integer of each row is greater than the last integer of the previous row, determine if a target value exists in the matrix.

## [](https://dev.to/tracelit/leetcode-74-search-a-2d-matrix-step-by-step-visual-tr

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LeetCode 74: Search A 2d Matrix — Step-by-Step Visual Trace

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