CF Elite Tracker
TopExploreDivisionsLearnPracticeUser solvedHelp
HelpLog inSign up

Top rated · Stats

yinianzhijian

Open on Codeforces · Unique solved

Rating2634· 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
125
Submissions (all)
240
Years with activity
2021–2026

Solved by problem rating

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

  • 800–89927
  • 900–9994
  • 1000–10993
  • 1100–11996
  • 1200–12995
  • 1300–13998
  • 1400–14996

Solved by topic

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

  • greedy58
  • math52
  • constructive algorithms34
  • dp33
  • brute force32
  • implementation31
  • data structures

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
2022-12-17 17:05Polynomial Round 2022 (Div. 1 + Div. 2, Rated, Prizes!)58+712634
2022-11-26 16:35Codeforces Global Round 24151-42563
2022-05-19 16:35Codeforces Round 792 (Div. 1 + Div. 2)88+602567
2022-05-08 16:35Codeforces Round 789 (Div. 1)50+1322507
2022-04-23 17:05Codeforces Global Round 20
1500–1599
5
  • 1600–16999
  • 1700–17996
  • 1800–18996
  • 1900–19997
  • 2000–20998
  • 2100–21994
  • 2200–22996
  • 2300–23994
  • 2400–24992
  • 2500–25993
  • 2600–26994
  • 2800–28991
  • 2900–29991
  • 30
  • sortings18
  • bitmasks15
  • two pointers14
  • number theory14
  • strings14
  • binary search10
  • combinatorics8
  • trees7
  • graphs7
  • dfs and similar6
  • divide and conquer4
  • games4
  • string suffix structures4
  • geometry3
  • hashing3
  • dsu2
  • matrices2
  • interactive2
  • graph matchings1
  • 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.

    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
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    LessMore (max 12/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 16/day in 2022)

    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 10/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 5/day in 2026)

    529
    -51
    2375
    2022-03-24 16:35CodeTON Round 1 (Div. 1 + Div. 2, Rated, Prizes!)498-532426
    2022-03-20 13:50Codeforces Round 778 (Div. 1 + Div. 2, based on Technocup 2022 Final Round)156+332479
    2022-03-06 12:10Codeforces Round 775 (Div. 1, based on Moscow Open Olympiad in Informatics)176+72446
    2021-12-29 17:35Good Bye 2021: 2022 is NEAR224+372439
    2021-11-14 08:20Codeforces Round 755 (Div. 1, based on Technocup 2022 Elimination Round 2)59+1202402
    2021-09-12 17:05Codeforces Global Round 16127+1422282
    2021-09-05 16:35Codeforces Round 742 (Div. 2)97+602140