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duancaicai

Open on Codeforces · Unique solved

Rating2181· 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
24
Unique solved
116
Submissions (all)
354
Years with activity
2022–2025

Solved by problem rating

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

  • Unrated19
  • 800–89937
  • 900–9996
  • 1000–10998
  • 1100–11996
  • 1200–12992
  • 1300–13994

Solved by topic

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

  • greedy50
  • math42
  • implementation32
  • constructive algorithms28
  • brute force22
  • sortings17

Rating changes

2022

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2022

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2025-11-16 16:35Codeforces Round 1064 (Div. 1)207+1032181
2025-11-14 16:35Educational Codeforces Round 184 (Rated for Div. 2)26+1892078
2025-11-10 17:05Codeforces Round 1063 (Div. 2)303+731889
2025-11-06 17:35Codeforces Global Round 30 (Div. 1 + Div. 2)716+991816
2023-01-08 16:35Educational Codeforces Round 141 (Rated for Div. 2)
1400–1499
6
  • 1500–15995
  • 1600–16993
  • 1700–17995
  • 1800–18993
  • 1900–19993
  • 2000–20993
  • 2100–21992
  • 2200–22991
  • 2400–24992
  • 2500–25991
  • data structures
    14
  • binary search13
  • number theory12
  • dp11
  • strings8
  • two pointers6
  • bitmasks5
  • combinatorics4
  • dfs and similar4
  • dsu3
  • graphs3
  • divide and conquer2
  • geometry2
  • hashing2
  • games2
  • probabilities1
  • interactive1
  • string suffix structures1
  • 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 10/day in 2022)

    2023

    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 50/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 16/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 29/day in 2025)

    456
    +103
    1717
    2023-01-05 16:35Codeforces Round 842 (Div. 2)2405-181614
    2023-01-03 17:05Hello 20232536+151632
    2022-12-27 16:35Codeforces Round 841 (Div. 2) and Divide by Zero 2022685+961617
    2022-12-19 16:35Codeforces Round 840 (Div. 2) and Enigma 2022 - Cybros LNMIIT415+1871521
    2022-12-18 16:50Codeforces Round 839 (Div. 3)1452+631334
    2022-12-16 16:35Educational Codeforces Round 140 (Rated for Div. 2)2442+1071271
    2022-08-30 17:05Codeforces Round 817 (Div. 4)6036-141164