How to Solve Day of the Year Leetcode Problem - Interview Coder Guide
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How to Solve Day of the Year Problem

Master the Day of the Year LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.

Interview Coder generates complete solutions and debugging hints that you can use while explaining your approach, so you stay calm and in control.

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Easy#1260
LeetCode Problem

Day of the Year

Given a string date representing a Gregorian calendar date formatted as YYYY-MM-DD, return the day number of the year.

MathString

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Problem Breakdown

Understanding the Day of the Year Problem

Let's break down this LeetCode problem and understand what makes it challenging in interview settings.

Problem Statement

Given a string date representing a Gregorian calendar date formatted as YYYY-MM-DD, return the day number of the year.

EasyProblem #1260
LeetCode

Day of the Year

Related Topics
MathString
How Interview Coder Helps

Get real-time assistance for Day of the Year problems during coding interviews. Interview Coder provides instant solutions and explanations.

Examples

Example 1
INPUT
date = "2019-01-09"
OUTPUT
9
EXPLANATION

Given date is the 9th day of the year in 2019.

Example 2
INPUT
date = "2019-02-10"
OUTPUT
41

Constraints

date.length == 10
date[4] == date[7] == '-', and all other date[i]'s are digits
date represents a calendar date between Jan 1st, 1900 and Dec 31st, 2019.

How Interview Coder Helps with Leetcode Problems

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Undetectability Checklist

Run compatibility test before interviews
Use recommended Zoom version settings
Enable advanced screen capture options
Verify native desktop architecture
Test with screen recording software

Platform Compatibility

Zoom
Supported
Google Meet
Supported
HackerRank
Supported
CodeSignal
Supported
CoderPad
Supported
Teams
Supported

User results and traction

More than 87,000 developers use Interview Coder and early launch metrics showed rapid adoption. Social proof signals that this approach helps real candidates land offers across a range of companies.

Undetectability and technical details

Our native desktop architecture avoids common detection vectors used by browser extensions. We provide a clear checklist so you can run basic checks and confirm the app will be invisible during live interviews.

Platform compatibility and limitations

We work with Zoom, HackerRank, CodeSignal, CoderPad and other web based platforms, with a known list of app version caveats. Check the compatibility note and request a browser link if a specific desktop app is unsupported.

Frequently Asked Questions

Common questions about solving Day of the Year and using Interview Coder during coding interviews.

Interview Coder generates complete solutions instantly with proper complexity analysis, letting you focus on explaining your approach and demonstrating problem-solving skills rather than getting stuck on implementation details during high-pressure situations.

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