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jhzjk

Open on Codeforces · Unique solved

Rating2281· Master

Bar charts count unique accepted problems (merged with the global problem set for rating and tags). Heatmaps use UTC calendar days. Rating squares are sums of newRating − oldRating from user.rating when System update time falls on that day. Submissions count every row from user.status (all verdicts), paginated until Codeforces has no more rows—heavy accounts can take a few seconds.

Rated contests
17
Unique solved
1,087
Submissions (all)
2,495
Years with activity
2018–2026

Solved by problem rating

Unique accepted problems, bucketed by catalog rating (100‑point bands). Unrated = no rating in the problem set.

  • Unrated383
  • 800–89987
  • 900–99924
  • 1000–109923
  • 1100–119916
  • 1200–129929
  • 1300–139925

Solved by topic

Each problem counts once per tag (same as Codeforces tags). Top tags shown; remaining mass in “Other”.

  • math267
  • greedy251
  • dp199
  • data structures162
  • implementation153
  • constructive algorithms136

Rating changes

2018

Sum of rating deltas on each UTC day (GitHub-style weeks, Sunday top).

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2018

Download PNG

Count of submissions per UTC day (includes every verdict).

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2025-10-12 17:05Codeforces Round 1058 (Div. 1)417-342281
2025-09-24 14:50Codeforces Round 1053 (Div. 1)224+502315
2023-10-22 13:05Codeforces Round 905 (Div. 1)388-442265
2023-09-30 17:35Codeforces Round 901 (Div. 1)489-512309
2021-08-29 17:05Deltix Round, Summer 2021 (open for everyone, rated, Div. 1 + Div. 2)
1400–1499
33
  • 1500–159927
  • 1600–169933
  • 1700–179933
  • 1800–189929
  • 1900–199947
  • 2000–209920
  • 2100–219932
  • 2200–229937
  • 2300–239936
  • 2400–249940
  • 2500–259932
  • 2600–269932
  • 2700–279919
  • 2800–289911
  • 2900–299910
  • 3000–309913
  • 3100–31996
  • 3200–32995
  • 3300–33993
  • 3500–35992
  • brute force
    127
  • sortings98
  • trees82
  • binary search82
  • dfs and similar80
  • graphs78
  • number theory66
  • combinatorics64
  • two pointers53
  • bitmasks50
  • strings47
  • dsu29
  • divide and conquer25
  • shortest paths22
  • interactive21
  • probabilities20
  • hashing18
  • geometry18
  • games16
  • matrices11
  • string suffix structures9
  • *special8
  • Other (7 tags)31
  • Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    Green: rating up · red: rating down · intensity: |Δ| tiers (<50, 50–99, 100+). One square may combine multiple rated contests on the same UTC day.

    2019

    Sum of rating deltas on each UTC day (GitHub-style weeks, Sunday top).

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    Green: rating up · red: rating down · intensity: |Δ| tiers (<50, 50–99, 100+). One square may combine multiple rated contests on the same UTC day.

    2020

    Sum of rating deltas on each UTC day (GitHub-style weeks, Sunday top).

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    Green: rating up · red: rating down · intensity: |Δ| tiers (<50, 50–99, 100+). One square may combine multiple rated contests on the same UTC day.

    2021

    Sum of rating deltas on each UTC day (GitHub-style weeks, Sunday top).

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    Green: rating up · red: rating down · intensity: |Δ| tiers (<50, 50–99, 100+). One square may combine multiple rated contests on the same UTC day.

    2023

    Sum of rating deltas on each UTC day (GitHub-style weeks, Sunday top).

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
    Oct
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    Dec

    Green: rating up · red: rating down · intensity: |Δ| tiers (<50, 50–99, 100+). One square may combine multiple rated contests on the same UTC day.

    2024

    Sum of rating deltas on each UTC day (GitHub-style weeks, Sunday top).

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    Green: rating up · red: rating down · intensity: |Δ| tiers (<50, 50–99, 100+). One square may combine multiple rated contests on the same UTC day.

    2025

    Sum of rating deltas on each UTC day (GitHub-style weeks, Sunday top).

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    Green: rating up · red: rating down · intensity: |Δ| tiers (<50, 50–99, 100+). One square may combine multiple rated contests on the same UTC day.

    2026

    Sum of rating deltas on each UTC day (GitHub-style weeks, Sunday top).

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    Green: rating up · red: rating down · intensity: |Δ| tiers (<50, 50–99, 100+). One square may combine multiple rated contests on the same UTC day.

    May
    Jun
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    Nov
    Dec

    LessMore (max 8/day in 2018)

    2019

    Download PNG

    Count of submissions per UTC day (includes every verdict).

    Jan
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    LessMore (max 13/day in 2019)

    2020

    Download PNG

    Count of submissions per UTC day (includes every verdict).

    Jan
    Feb
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    LessMore (max 42/day in 2020)

    2021

    Download PNG

    Count of submissions per UTC day (includes every verdict).

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
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    LessMore (max 42/day in 2021)

    2023

    Download PNG

    Count of submissions per UTC day (includes every verdict).

    Jan
    Feb
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    Jun
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    LessMore (max 56/day in 2023)

    2024

    Download PNG

    Count of submissions per UTC day (includes every verdict).

    Jan
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    LessMore (max 29/day in 2024)

    2025

    Download PNG

    Count of submissions per UTC day (includes every verdict).

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
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    LessMore (max 28/day in 2025)

    2026

    Download PNG

    Count of submissions per UTC day (includes every verdict).

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
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    Dec

    LessMore (max 22/day in 2026)

    540
    -43
    2360
    2021-05-30 16:50Deltix Round, Spring 2021 (open for everyone, rated, Div. 1 + Div. 2)128+972403
    2021-04-23 17:20Contest 2050 and Codeforces Round 718 (Div. 1 + Div. 2)243+632306
    2020-11-01 13:05Codeforces Round 680 (Div. 1, based on Moscow Team Olympiad)267+332243
    2020-10-25 13:05Codeforces Round 679 (Div. 1, based on Technocup 2021 Elimination Round 1)171+1032210
    2020-03-31 16:05Codeforces Round 630 (Div. 2)35+1792107
    2020-03-09 16:35Educational Codeforces Round 83 (Rated for Div. 2)377+421928
    2020-03-01 15:15Codeforces Round 625 (Div. 2, based on Technocup 2020 Final Round)63+1421886