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qiuzx

Open on Codeforces · Unique solved

Rating3343· Legendary 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
80
Unique solved
2,662
Submissions (all)
5,796
Years with activity
2019–2026

Solved by problem rating

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

  • Unrated723
  • 800–899116
  • 900–99924
  • 1000–109939
  • 1100–119935
  • 1200–129943
  • 1300–1399

Solved by topic

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

  • math635
  • greedy629
  • dp617
  • data structures461
  • constructive algorithms387
  • implementation379

Rating changes

2019

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2019

Download PNG

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

Jan
Feb
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Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2026-01-07 17:35Hello 202629-753343
2025-12-19 17:05Codeforces Global Round 31 (Div. 1 + Div. 2)10+153418
2025-11-23 12:35Codeforces Round 1066 (Div. 1 + Div. 2)7+313403
2025-11-06 17:35Codeforces Global Round 30 (Div. 1 + Div. 2)6+653372
2025-10-03 17:35Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2)
42
  • 1400–149960
  • 1500–159937
  • 1600–169961
  • 1700–179959
  • 1800–189960
  • 1900–199963
  • 2000–209957
  • 2100–219979
  • 2200–229978
  • 2300–239980
  • 2400–2499115
  • 2500–259987
  • 2600–2699110
  • 2700–2799107
  • 2800–289985
  • 2900–299992
  • 3000–309983
  • 3100–319972
  • 3200–329961
  • 3300–339971
  • 3400–349929
  • 3500–359994
  • brute force
    336
  • graphs277
  • trees243
  • binary search241
  • sortings218
  • combinatorics212
  • dfs and similar207
  • bitmasks178
  • number theory156
  • strings127
  • two pointers111
  • divide and conquer103
  • dsu88
  • probabilities77
  • flows75
  • interactive70
  • games70
  • geometry67
  • shortest paths65
  • hashing63
  • *special62
  • fft51
  • Other (10 tags)161
  • 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.

    2026

    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.

    May
    Jun
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    Dec

    LessMore (max 27/day in 2019)

    2020

    Download PNG

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

    Jan
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    LessMore (max 25/day in 2020)

    2021

    Download PNG

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

    Jan
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    LessMore (max 32/day in 2021)

    2022

    Download PNG

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

    Jan
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    Jun
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    LessMore (max 32/day in 2022)

    2023

    Download PNG

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

    Jan
    Feb
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    May
    Jun
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    LessMore (max 50/day in 2023)

    2024

    Download PNG

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

    Jan
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    Dec

    LessMore (max 23/day in 2024)

    2025

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
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    LessMore (max 21/day in 2025)

    2026

    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 20/day in 2026)

    2
    +222
    3307
    2025-09-24 14:50Codeforces Round 1053 (Div. 1)22+313085
    2025-08-28 17:35Codeforces Round 1046 (Div. 1)22+193054
    2025-08-07 17:35Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2)41-63035
    2025-07-31 17:35Codeforces Round 1040 (Div. 1)29+113041
    2025-04-26 11:35Codeforces Round 1021 (Div. 1)9+993030
    2025-04-19 16:35Neowise Labs Contest 1 (Codeforces Round 1018, Div. 1 + Div. 2)268-1452931
    2025-03-10 17:15Codeforces Round 1008 (Div. 1)51-553076