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superyijin

Open on Codeforces · Unique solved

Rating2331· International 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
50
Unique solved
342
Submissions (all)
929
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.

  • Unrated1
  • 800–89969
  • 900–99910
  • 1000–109921
  • 1100–119913
  • 1200–129913
  • 1300–139912

Solved by topic

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

  • greedy151
  • math134
  • constructive algorithms120
  • implementation101
  • brute force75
  • dp63
  • data structures

Rating changes

2022

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

Jan
Feb
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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
2024-03-16 17:00Codeforces Round 934 (Div. 1)330-22331
2024-02-29 16:35Codeforces Round 930 (Div. 1)303-222333
2024-02-17 17:35think-cell Round 1344-32355
2023-12-30 16:50Good Bye 2023395+182358
2023-12-23 17:35Pinely Round 3 (Div. 1 + Div. 2)126+113
1400–1499
19
  • 1500–159910
  • 1600–169912
  • 1700–179923
  • 1800–189917
  • 1900–199924
  • 2000–209921
  • 2100–219918
  • 2200–22998
  • 2300–239914
  • 2400–249914
  • 2500–25999
  • 2600–26992
  • 2700–27996
  • 2800–28992
  • 2900–29992
  • 3000–30991
  • 3100–31991
  • 57
  • sortings48
  • binary search39
  • strings34
  • combinatorics29
  • graphs28
  • dfs and similar27
  • bitmasks26
  • two pointers25
  • number theory25
  • trees17
  • dsu16
  • geometry12
  • divide and conquer12
  • games10
  • hashing8
  • shortest paths7
  • interactive7
  • probabilities7
  • matrices7
  • meet-in-the-middle4
  • string suffix structures4
  • Other (6 tags)14
  • 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.

    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
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    LessMore (max 31/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 33/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 28/day in 2024)

    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 1/day in 2026)

    2340
    2023-09-30 17:35Codeforces Round 901 (Div. 1)215+892227
    2023-06-03 16:35Codeforces Round 876 (Div. 2)15+1682138
    2023-05-25 16:35Educational Codeforces Round 149 (Rated for Div. 2)106+1131970
    2023-03-26 16:35Codeforces Round 860 (Div. 2)860-141857
    2023-02-28 16:35Educational Codeforces Round 144 (Rated for Div. 2)465+241871
    2023-02-27 17:35Codeforces Round 854 by cybercats (Div. 1 + Div. 2)1862-781847
    2023-02-12 10:35Codeforces Round 852 (Div. 2)1281-741925