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zmy123456

Open on Codeforces · Unique solved

Rating2426· 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
24
Unique solved
1,039
Submissions (all)
2,118
Years with activity
2019–2025

Solved by problem rating

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

  • Unrated303
  • 800–899128
  • 900–99941
  • 1000–109925
  • 1100–119945
  • 1200–129935
  • 1300–139941

Solved by topic

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

  • greedy348
  • math295
  • implementation216
  • constructive algorithms211
  • brute force176
  • dp162
  • data structures

Rating changes

2019

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

Jan
Feb
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Apr
May

Submission volume

Download all years PNG

2019

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2024-01-06 17:05Hello 2024487-292426
2023-12-23 17:35Pinely Round 3 (Div. 1 + Div. 2)87+1072455
2023-11-25 17:20CodeTON Round 7 (Div. 1 + Div. 2, Rated, Prizes!)121+1082348
2023-11-07 16:35Codeforces Round 908 (Div. 1)451-282240
2022-12-17 17:05Polynomial Round 2022 (Div. 1 + Div. 2, Rated, Prizes!)
1400–1499
40
  • 1500–159934
  • 1600–169937
  • 1700–179943
  • 1800–189941
  • 1900–199941
  • 2000–209924
  • 2100–219927
  • 2200–229927
  • 2300–239919
  • 2400–249926
  • 2500–259924
  • 2600–269914
  • 2700–279912
  • 2800–28993
  • 2900–29993
  • 3000–30992
  • 3100–31991
  • 3200–32993
  • 145
  • sortings104
  • binary search99
  • dfs and similar71
  • strings69
  • graphs68
  • bitmasks68
  • combinatorics67
  • number theory62
  • two pointers59
  • trees58
  • games29
  • dsu29
  • divide and conquer24
  • geometry23
  • interactive18
  • shortest paths18
  • hashing14
  • probabilities11
  • ternary search11
  • flows5
  • string suffix structures4
  • Other (7 tags)10
  • 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.

    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
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    Dec

    LessMore (max 5/day in 2019)

    2020

    Download PNG

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

    Jan
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    LessMore (max 41/day in 2020)

    2021

    Download PNG

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

    Jan
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    May
    Jun
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    LessMore (max 16/day in 2021)

    2022

    Download PNG

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

    Jan
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    LessMore (max 46/day in 2022)

    2023

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
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    LessMore (max 38/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 26/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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    Nov
    Dec

    LessMore (max 34/day in 2025)

    293
    +36
    2268
    2021-03-10 14:05Codeforces Round 706 (Div. 1)52+2742232
    2021-02-28 16:35Codeforces Global Round 131371-51958
    2020-11-21 16:50Codeforces Round 685 (Div. 2)322+551963
    2020-05-12 15:05Codeforces Round 641 (Div. 1)875+31908
    2020-03-09 16:35Educational Codeforces Round 83 (Rated for Div. 2)254+821905
    2020-03-07 11:35Codeforces Round 626 (Div. 2, based on Moscow Open Olympiad in Informatics)1108-571823
    2020-03-04 16:35CodeCraft-20 (Div. 2)380+521880