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kenkenkenken

Open on Codeforces · Unique solved

Rating2032· Candidate 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
52
Unique solved
244
Submissions (all)
619
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.

  • Unrated26
  • 800–89951
  • 900–9999
  • 1000–109911
  • 1100–119914
  • 1200–129914
  • 1300–139924

Solved by topic

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

  • greedy103
  • math71
  • implementation60
  • constructive algorithms58
  • brute force52
  • dp50
  • sortings

Rating changes

2021

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

Jan
Feb
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May

Submission volume

Download all years PNG

2021

Download PNG

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

Jan
Feb
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Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2026-05-06 08:35Codeforces Round 1097 (Div. 1, Based on Zhili Cup 2026)490-1002032
2026-04-25 17:05Spectral::Cup 2026 Round 1 (Codeforces Round 1094, Div. 1 + Div. 2)354+582132
2026-03-14 16:35Codeforces Round 1086 (Div. 2)393-62074
2026-03-08 17:35Codeforces Round 1085 (Div. 1 + Div. 2)931-602080
2026-02-23 17:05Codeforces Round 1082 (Div. 1)
1400–1499
10
  • 1500–15995
  • 1600–169914
  • 1700–179910
  • 1800–189913
  • 1900–199914
  • 2000–209910
  • 2100–21993
  • 2200–22996
  • 2300–23995
  • 2400–24992
  • 2500–25991
  • 2800–28991
  • 3500–35991
  • 38
  • data structures37
  • dfs and similar28
  • graphs26
  • binary search23
  • strings18
  • bitmasks17
  • two pointers16
  • trees16
  • combinatorics16
  • number theory14
  • interactive9
  • dsu8
  • games6
  • graph matchings5
  • geometry4
  • shortest paths4
  • matrices3
  • divide and conquer3
  • fft2
  • chinese remainder theorem1
  • hashing1
  • Other (1 tag)1
  • Jun
    Jul
    Aug
    Sep
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    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
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    Jun
    Jul
    Aug
    Sep
    Oct
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    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
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    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
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    Dec

    LessMore (max 21/day in 2021)

    2022

    Download PNG

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

    Jan
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    LessMore (max 17/day in 2022)

    2023

    Download PNG

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

    Jan
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    LessMore (max 10/day in 2023)

    2024

    Download PNG

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

    Jan
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    LessMore (max 9/day in 2024)

    2025

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
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    LessMore (max 41/day in 2025)

    2026

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
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    Dec

    LessMore (max 26/day in 2026)

    369
    +15
    2140
    2026-02-21 16:35Codeforces Round 1081 (Div. 2)42+1152125
    2026-02-11 17:35Codeforces Round 1079 (Div. 1)707-672010
    2026-02-08 11:05Codeforces Round 1078 (Div. 2)328-132077
    2026-01-29 17:35Codeforces Round 1077 (Div. 1)427-92090
    2025-12-29 16:35Educational Codeforces Round 186 (Rated for Div. 2)103+752099
    2025-12-27 17:35Good Bye 2025623+752024
    2025-09-15 16:35Educational Codeforces Round 182 (Rated for Div. 2)4414-1491949