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Top rated · Stats

ZhangCW_QwQ

Open on Codeforces · Unique solved

Rating2150· 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
23
Unique solved
214
Submissions (all)
689
Years with activity
2020–2024

Solved by problem rating

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

  • Unrated16
  • 800–89924
  • 900–9997
  • 1000–10995
  • 1100–11999
  • 1200–12998
  • 1300–13994

Solved by topic

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

  • dp66
  • math60
  • greedy59
  • data structures51
  • brute force37
  • constructive algorithms36
  • implementation

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
2022-08-16 16:35Codeforces Round 814 (Div. 1)516-342150
2022-07-16 16:35Codeforces Round 808 (Div. 1)385+22184
2022-06-25 16:50Codeforces Global Round 21976-552182
2022-06-03 16:35Codeforces Round 796 (Div. 1)402-412237
2022-03-20 13:50Codeforces Round 778 (Div. 1 + Div. 2, based on Technocup 2022 Final Round)
1400–1499
7
  • 1500–15995
  • 1600–16999
  • 1700–17996
  • 1800–18996
  • 1900–199914
  • 2000–20998
  • 2100–21998
  • 2200–22995
  • 2300–239912
  • 2400–24996
  • 2500–259910
  • 2600–269910
  • 2700–27998
  • 2800–28994
  • 2900–29995
  • 3000–30994
  • 3100–31994
  • 3200–32994
  • 3300–33993
  • 3400–34992
  • 3500–35991
  • 35
  • sortings31
  • trees24
  • binary search24
  • number theory22
  • graphs22
  • bitmasks21
  • combinatorics21
  • dfs and similar17
  • strings16
  • two pointers11
  • divide and conquer10
  • probabilities9
  • fft8
  • shortest paths7
  • dsu7
  • flows6
  • matrices4
  • games4
  • hashing3
  • string suffix structures3
  • graph matchings2
  • Other (3 tags)4
  • 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.

    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.

    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    LessMore (max 22/day in 2020)

    2021

    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 2021)

    2022

    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 33/day in 2022)

    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 1/day in 2024)

    193
    +83
    2278
    2022-03-06 12:10Codeforces Round 775 (Div. 1, based on Moscow Open Olympiad in Informatics)209+852195
    2022-02-23 12:10Codeforces Round 773 (Div. 1)375+462110
    2022-01-30 16:35Codeforces Round 769 (Div. 2)104+962064
    2022-01-27 16:35Codeforces Round 768 (Div. 2)18+2101968
    2022-01-15 16:35Codeforces Round 766 (Div. 2)935+171758
    2021-10-25 08:35Codeforces Round 751 (Div. 2)250+681741
    2021-10-24 12:35Codeforces Round 750 (Div. 2)2261-651673