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Shihaowen

Open on Codeforces · Unique solved

Rating2223· 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
10
Unique solved
127
Submissions (all)
310
Years with activity
2021–2025

Solved by problem rating

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

  • Unrated23
  • 800–89915
  • 900–9994
  • 1000–10995
  • 1100–11997
  • 1200–12994
  • 1300–13992

Solved by topic

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

  • greedy57
  • math47
  • dp36
  • constructive algorithms28
  • implementation28
  • data structures24
  • sortings

Rating changes

2021

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2021

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2025-04-05 17:35Teza Round 1 (Codeforces Round 1015, Div. 1 + Div. 2)431+262223
2025-01-20 17:35IAEPC Preliminary Contest (Codeforces Round 999, Div. 1 + Div. 2)508+122197
2024-12-08 16:35Codeforces Round 992 (Div. 2)35+1082185
2024-12-03 08:25Codeforces Round 990 (Div. 1)321+492077
2024-11-15 14:35Codeforces Round 987 (Div. 2)
1400–1499
4
  • 1600–16998
  • 1700–17996
  • 1800–189913
  • 1900–19995
  • 2000–20994
  • 2100–21998
  • 2200–22994
  • 2300–23995
  • 2400–24993
  • 2500–25994
  • 2600–26992
  • 3100–31991
  • 21
  • brute force19
  • binary search18
  • combinatorics15
  • dfs and similar14
  • trees12
  • two pointers12
  • bitmasks10
  • graphs9
  • number theory8
  • dsu6
  • games4
  • 2-sat2
  • probabilities2
  • flows2
  • interactive2
  • strings2
  • fft1
  • geometry1
  • ternary search1
  • shortest paths1
  • matrices1
  • Other (1 tag)1
  • 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
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    LessMore (max 2/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 8/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 10/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 20/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 14/day in 2025)

    343
    +65
    2028
    2024-11-01 16:35Codeforces Round 983 (Div. 2)303+1351963
    2024-10-19 16:20Codeforces Round 979 (Div. 2)28+3731828
    2024-09-27 16:05Codeforces Round 975 (Div. 2)152+4161455
    2024-09-14 16:35Codeforces Round 972 (Div. 2)1265+4341039
    2024-08-15 16:35Educational Codeforces Round 169 (Rated for Div. 2)1619+605605