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sichengzhou

Open on Codeforces · Unique solved

Rating2202· 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
12
Unique solved
124
Submissions (all)
352
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.

  • Unrated3
  • 800–89916
  • 900–9991
  • 1000–10995
  • 1100–11994
  • 1200–12997
  • 1300–13997

Solved by topic

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

  • greedy61
  • math43
  • implementation37
  • dp35
  • constructive algorithms33
  • data structures31
  • brute force

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
2025-05-11 17:05Codeforces Round 1024 (Div. 1)279+432202
2024-11-30 17:35Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2)1647-1102159
2024-11-23 17:35CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)281+702269
2024-10-13 21:35Codeforces Round 978 (Div. 2)10+1542199
2024-09-27 16:05Codeforces Round 975 (Div. 1)
1400–1499
3
  • 1500–15994
  • 1600–16992
  • 1700–17995
  • 1800–18994
  • 1900–19997
  • 2000–20994
  • 2100–21991
  • 2200–22994
  • 2300–23994
  • 2400–24995
  • 2500–25994
  • 2600–26995
  • 2700–27995
  • 2800–28992
  • 2900–29995
  • 3000–30997
  • 3100–31993
  • 3200–32994
  • 3300–33992
  • 3500–35991
  • 25
  • binary search19
  • graphs16
  • bitmasks15
  • trees14
  • combinatorics12
  • dfs and similar12
  • sortings11
  • number theory10
  • two pointers9
  • dsu7
  • divide and conquer6
  • strings6
  • probabilities5
  • hashing4
  • interactive4
  • geometry4
  • matrices3
  • games3
  • 2-sat2
  • flows2
  • string suffix structures2
  • Other (4 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.

    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 19/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 8/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 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 12/day in 2025)

    993
    -82
    2045
    2024-08-11 17:35EPIC Institute of Technology Round August 2024 (Div. 1 + Div. 2)732+132127
    2024-07-28 17:35Pinely Round 4 (Div. 1 + Div. 2)1358-92114
    2024-06-25 16:35Codeforces Round 955 (Div. 2, with prizes from NEAR!)14+2922123
    2024-06-09 17:35Codeforces Global Round 26319+3741831
    2024-06-06 16:35Codeforces Round 951 (Div. 2)161+4391457
    2023-12-03 16:35Educational Codeforces Round 159 (Rated for Div. 2)893+4341018
    2023-11-24 16:35Educational Codeforces Round 158 (Rated for Div. 2)1341+584584