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Zhtluo

Open on Codeforces · Unique solved

Rating2372· International 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
33
Unique solved
186
Submissions (all)
594
Years with activity
2020–2025

Solved by problem rating

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

  • Unrated6
  • 800–89929
  • 900–9997
  • 1000–10996
  • 1100–119913
  • 1200–12997
  • 1300–13999

Solved by topic

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

  • greedy105
  • math76
  • constructive algorithms63
  • implementation46
  • dp41
  • brute force38
  • data structures

Rating changes

2020

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2020

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2024-06-09 17:35Codeforces Global Round 26680-662372
2024-05-25 17:35Codeforces Round 947 (Div. 1 + Div. 2)127+582438
2024-04-30 17:05Codeforces Round 942 (Div. 1)280+82380
2024-04-27 16:35Codeforces Round 941 (Div. 1)230+342372
2024-04-06 17:35Codeforces Global Round 25351
1400–1499
12
  • 1500–15996
  • 1600–16996
  • 1700–179912
  • 1800–189911
  • 1900–199910
  • 2000–209911
  • 2100–219910
  • 2200–22997
  • 2300–23997
  • 2400–24995
  • 2500–25993
  • 2600–26995
  • 2700–27992
  • 2800–28991
  • 3100–31991
  • 33
  • sortings30
  • binary search23
  • strings18
  • graphs18
  • bitmasks16
  • trees16
  • number theory15
  • combinatorics15
  • dfs and similar13
  • two pointers11
  • dsu8
  • games7
  • interactive6
  • divide and conquer6
  • hashing4
  • shortest paths4
  • string suffix structures2
  • geometry2
  • flows1
  • matrices1
  • probabilities1
  • Other (2 tags)2
  • 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.

    2022

    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
    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.

    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
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    LessMore (max 20/day in 2020)

    2021

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
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    Dec

    LessMore (max 127/day in 2021)

    2022

    Download PNG

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

    Jan
    Feb
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    Apr
    May
    Jun
    Jul
    Aug
    Sep
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    Dec

    LessMore (max 13/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 17/day in 2023)

    2024

    Download PNG

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

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

    LessMore (max 17/day in 2024)

    2025

    Download PNG

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

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

    LessMore (max 8/day in 2025)

    +17
    2338
    2024-02-17 17:35think-cell Round 1470-252321
    2024-01-06 17:05Hello 2024153+1182346
    2023-12-30 16:50Good Bye 20231043-412228
    2023-12-23 17:35Pinely Round 3 (Div. 1 + Div. 2)599-282269
    2023-10-28 17:05Codeforces Round 906 (Div. 1)316-32297
    2023-09-10 16:35Codeforces Round 896 (Div. 1)442-412300
    2023-08-30 17:35Pinely Round 2 (Div. 1 + Div. 2)681-662341