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acmicpc.net

https://acmicpc.net· First analyzed 24 May 2026· Updated 24 May 2026
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acmicpc.net
Desktop screenshot of acmicpc.net
Mobile screenshot of acmicpc.net
Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)
aws.amazon.com

IP Address

18.165.122.80

Site Location

🇮🇪 Irelandvia ip

Server Location

🇮🇪 Dublin, Ireland

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

Server

Nginx

Nameservers

ns-1947.awsdns-51.co.uk.ns-325.awsdns-40.com.ns-565.awsdns-06.net.ns-1102.awsdns-09.org.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
430 ms10%
Speed Index
559 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
31 KB
16 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
Infrastructure
Hosting
Amazon Web Services (AWS)

Technology Stack

5 Technologies Detected

CSS Frameworks

2
Bootstrap
Tailwind CSS

Libraries

1
jQuery

Fonts

1
Google Fonts

Web Servers

1
Nginxv1.22.1

SEO Analysis

F28/100
9
8
3
Meta Tags4/15
Content0/12
Headings6/8
Technical9/21
E-E-A-T0/7
Images0/7
Links0/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability0/3
A
acmicpc.netacmicpc.net

BOJ 서비스 종료

No description available for this page.

Title Length10 chars

Recommended: 50-60 chars (~64px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

  • • Missing meta description — important for click-through rates in SERPs
  • • Very thin content (26 words). Search engines need substantial content for ranking.
  • • Page is set to noindex — will not appear in search results

11 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

Local SEO

Local Search Readiness

3/100
Poor
1 14 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

F33/100
Bot Access
20/25
Machine Read.
11/25
Schema Data
0/25
Citation
2/25

AI Bot Access

14/14 accessible
AI Search
OAI-SearchBot
PerplexityBot
Claude-SearchBot
Gemini-Deep-Research
DuckAssistBot
Training
GPTBot
ClaudeBot
Google-Extended
Meta-ExternalAgent
Bytespiderinfo
Amazonbot
Applebot-Extended
CCBotinfo
Fetch
ChatGPT-User

Machine Readability

llms.txtinvalid
llms-full.txt
Semantic HTML
Heading Hierarchy
Text ratio:3%
Words:23
Token eff.:Too Short

Structured Data

No Schema

Citation Readiness

Opening Summary
Descriptive Headings
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (10)
AI readiness recommendation preview...
Upgrade to view recommendations

Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
B
76/100
10
Passed
1
Critical
0
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
16/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
15/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
9/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
1/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
1 recommendation
  • •Accessibility recommendation preview...
Upgrade to view recommendations

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
68/100
A+
3 mg
CO₂e / view
30.9 KB
Page Weight
95%
Cleaner Than
New Visitor
4 mg
vs
Returning (cached)
2 mg
Annual (10K/mo)
372 g
Emission Segments
Data Center
<0.001 g
Network
<0.001 g
Device
2 mg
Resource Breakdown
Fonts
29.4 KB
HTML
1.5 KB
Green Hosting Verified
Amazon Web Services (AWS)
Provider Match
4 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
B

Security Score

71%Good
Static / Informational

HTTPS

No WAF

198d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Amazon

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

10.11.2025

Valid Until

08.12.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

*.acmicpc.net

SHA-256 Fingerprint

19:C0:86:A9:AA:53:37:BB:19:5F:A9:C6:95:CA:1C:07:50:02:2E:F9...

Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

content-encoding
📦 Gzip(gzip)
content-length
1248
content-type
text/html; charset=UTF-8
date
Sun, 24 May 2026 22:18:58 GMT
server
nginx/1.22.1
vary
Accept-Encoding
Good Warning Issue

Email Infrastructure

Google Workspace

Score

70

SPF
DKIM
DMARC

DMARC Policy

Reject (Strictest)

MX Records (5)

aspmx.l.google.com
alt2.aspmx.l.google.com
alt1.aspmx.l.google.com
aspmx3.googlemail.com

+1 more

Domain Information

acmicpc.net

Domain Age
17y 10m

Created

21.07.2008

Expires

21.07.2026

Last Updated

15.07.2024

Registrar

GoDaddy.com, LLC

DNSSEC
Not Enabled

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
D
59/100
Mobile Friendly1 breakpoint
Viewport Meta
The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
Responsive Design
Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
Touch Icons
Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
Readable Font Size
Base font size should be at least 16px on mobile to ensure text is readable without zooming.
Relative Units
Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
No H-Scroll Risk
No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
Tap Targets OK
Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
No Fixed Widths
No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
Viewport
width=device-width, initial-scale=1, shrink-to-fit=no
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Helvetica Neue

WCAG Fail
77/100
Readability
/30
26/30

22px · LH 1.60

Hierarchy
/20
17/20

2.86x ratio · ✓ H1→H6

WCAG
/25
15/25

1:1 min contrast

Performance
/25
19/25

System fonts

Heading Font

Helvetica Neue

Sans63px

Body Font

Helvetica Neue

Sans22px

Contrast Ratio

1:1

4 issues

Reading Comfort

Single Font Family

center aligned
63px
h1
22px
p

✅ Excellent readability: 22px body text is ideal for all devices.

✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

❌ Low contrast: 4 elements fail WCAG AA (min 1.0:1). Increase text/background contrast.

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 2.9x larger than body text.

✅ System fonts: Zero font loading delay — best possible LCP impact.

GGoogle Fonts

Color Palette

7 unique colors
15.57:1 AAA Dark
#191919
Text· 95.89999999999998%
#f1f1f1
Background· 0.6%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

Sponsored

Scripts & Styles

15 Resources

9
Scripts
6
Styles
0
Async
0
Defer

Top Script Sources

d2tya2pu1vb4ry.cloudfront.net(9)

Website Identity

acmicpc.net

17 years old
Location detected: 🇮🇪 Irelandvia ip
GoDaddy.com, LLC📧 Google Workspaceko

Sponsored

Last analyzed: 24 May 2026 at 22:19

Historical Analysis & Change Tracking