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wutongchun

Open on Codeforces · Unique solved

Rating2958· International 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
25
Unique solved
627
Submissions (all)
1,371
Years with activity
2022–2026

Solved by problem rating

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

  • Unrated7
  • 800–89933
  • 900–99912
  • 1000–10996
  • 1100–11998
  • 1200–129911
  • 1300–139921

Solved by topic

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

  • greedy229
  • math225
  • dp193
  • constructive algorithms178
  • data structures147
  • implementation112

Rating changes

2022

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

2022

Download PNG

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

Jan
Feb
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Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2025-12-06 10:15Codeforces Round 1069 (Div. 1)8+882958
2025-11-23 12:35Codeforces Round 1066 (Div. 1 + Div. 2)65-102870
2025-09-24 14:50Codeforces Round 1053 (Div. 1)21+1052880
2025-01-26 17:05Ethflow Round 1 (Codeforces Round 1001, Div. 1 + Div. 2)47+872775
2024-12-28 17:35Good Bye 2024: 2025 is NEAR
1400–1499
19
  • 1500–15999
  • 1600–169915
  • 1700–179922
  • 1800–189916
  • 1900–199928
  • 2000–209921
  • 2100–219922
  • 2200–229917
  • 2300–239937
  • 2400–249937
  • 2500–259930
  • 2600–269937
  • 2700–279931
  • 2800–289928
  • 2900–299928
  • 3000–309929
  • 3100–319927
  • 3200–329919
  • 3300–339913
  • 3400–349916
  • 3500–359928
  • brute force
    111
  • graphs89
  • combinatorics78
  • binary search77
  • sortings72
  • bitmasks69
  • trees68
  • dfs and similar60
  • number theory52
  • strings44
  • divide and conquer39
  • two pointers37
  • interactive33
  • probabilities33
  • dsu31
  • geometry23
  • games21
  • flows21
  • hashing20
  • shortest paths18
  • string suffix structures16
  • matrices14
  • Other (9 tags)45
  • 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
    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 6/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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    Dec

    LessMore (max 32/day in 2023)

    2024

    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 22/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 24/day in 2025)

    2026

    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 34/day in 2026)

    35
    +141
    2688
    2024-10-27 17:35Codeforces Global Round 27288-362547
    2024-10-20 11:05Codeforces Round 980 (Div. 1)122+142583
    2024-09-27 16:05Codeforces Round 975 (Div. 1)110+412569
    2024-08-30 17:05Codeforces Round 969 (Div. 1)127+362528
    2024-06-09 17:35Codeforces Global Round 26185+302492
    2024-02-29 16:35Codeforces Round 930 (Div. 1)88+682462
    2023-12-30 16:50Good Bye 2023372+112394