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Junz_LJL

Open on Codeforces · Unique solved

Rating2417· Grandmaster

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
47
Unique solved
2,371
Submissions (all)
5,479
Years with activity
2021–2025

Solved by problem rating

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

  • Unrated119
  • 800–899451
  • 900–999105
  • 1000–1099101
  • 1100–1199122
  • 1200–1299104
  • 1300–1399100

Solved by topic

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

  • greedy1,047
  • math900
  • implementation634
  • constructive algorithms564
  • dp559
  • brute force539
  • data structures

Rating changes

2021

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

Jan
Feb
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May

Submission volume

Download all years PNG

2021

Download PNG

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

Jan
Feb
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Recent rated rounds

When (UTC)ContestRankΔNew
2024-12-03 08:25Codeforces Round 990 (Div. 1)120+452417
2024-11-23 17:35CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)119+1252372
2024-11-09 17:35Refact.ai Match 1 (Codeforces Round 985)376+282247
2024-10-14 16:35Educational Codeforces Round 170 (Rated for Div. 2)9+1982219
2024-10-06 08:05Codeforces Round 977 (Div. 2, based on COMPFEST 16 - Final Round)
1400–1499
92
  • 1500–159980
  • 1600–1699101
  • 1700–1799102
  • 1800–189996
  • 1900–1999124
  • 2000–209987
  • 2100–219991
  • 2200–2299127
  • 2300–239978
  • 2400–249988
  • 2500–259961
  • 2600–269935
  • 2700–279934
  • 2800–289920
  • 2900–299920
  • 3000–30998
  • 3100–31998
  • 3200–32995
  • 3300–33994
  • 3400–34993
  • 3500–35995
  • 480
  • sortings319
  • binary search318
  • graphs238
  • dfs and similar230
  • number theory226
  • bitmasks193
  • trees189
  • combinatorics188
  • strings186
  • two pointers176
  • dsu98
  • games75
  • divide and conquer70
  • interactive61
  • shortest paths57
  • geometry55
  • hashing48
  • probabilities41
  • flows21
  • matrices20
  • ternary search16
  • Other (9 tags)72
  • Jun
    Jul
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    Sep
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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.

    2022

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
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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.

    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.

    May
    Jun
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    Sep
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    Dec

    LessMore (max 20/day in 2021)

    2022

    Download PNG

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

    Jan
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    LessMore (max 6/day in 2022)

    2023

    Download PNG

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

    Jan
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    Jun
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    LessMore (max 71/day in 2023)

    2024

    Download PNG

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

    Jan
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    May
    Jun
    Jul
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    LessMore (max 46/day in 2024)

    2025

    Download PNG

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

    Jan
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    May
    Jun
    Jul
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    LessMore (max 18/day in 2025)

    1102
    -67
    2021
    2024-09-27 16:05Codeforces Round 975 (Div. 1)509+342088
    2024-08-30 17:05Codeforces Round 969 (Div. 1)759-462054
    2024-04-21 16:50Codeforces Round 940 (Div. 2) and CodeCraft-2390+822100
    2024-04-13 16:35Codeforces Round 939 (Div. 2)544-142018
    2024-04-12 16:35Educational Codeforces Round 164 (Rated for Div. 2)781-372032
    2024-03-30 17:35CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)2965-1512069
    2024-02-23 16:35Educational Codeforces Round 162 (Rated for Div. 2)21+1342220