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HaccerKat

Open on Codeforces · Unique solved

Rating2185· 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
77
Unique solved
1,153
Submissions (all)
2,643
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.

  • Unrated40
  • 800–899169
  • 900–99937
  • 1000–109936
  • 1100–119945
  • 1200–129947
  • 1300–139936

Solved by topic

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

  • greedy498
  • math459
  • implementation309
  • constructive algorithms306
  • dp290
  • data structures250

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
2025-01-26 17:05Ethflow Round 1 (Codeforces Round 1001, Div. 1 + Div. 2)1819-1032185
2025-01-20 17:35IAEPC Preliminary Contest (Codeforces Round 999, Div. 1 + Div. 2)292+422288
2024-11-30 17:35Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2)387+392246
2024-11-23 17:35CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)565+122207
2024-11-09 17:35
1400–1499
55
  • 1500–159943
  • 1600–169959
  • 1700–179976
  • 1800–189951
  • 1900–199963
  • 2000–209967
  • 2100–219946
  • 2200–229951
  • 2300–239938
  • 2400–249962
  • 2500–259949
  • 2600–269927
  • 2700–279913
  • 2800–28992
  • 2900–29997
  • 3000–309911
  • 3100–319911
  • 3200–32994
  • 3300–33996
  • 3400–34991
  • 3500–35991
  • brute force
    245
  • sortings173
  • binary search165
  • graphs131
  • number theory119
  • bitmasks118
  • dfs and similar118
  • two pointers109
  • trees98
  • combinatorics87
  • strings85
  • dsu53
  • games40
  • interactive39
  • divide and conquer37
  • shortest paths35
  • probabilities28
  • geometry27
  • hashing26
  • flows20
  • matrices16
  • graph matchings13
  • Other (9 tags)43
  • 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 21/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 76/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 9/day in 2025)

    Refact.ai Match 1 (Codeforces Round 985)
    271
    +84
    2195
    2024-09-27 16:05Codeforces Round 975 (Div. 1)781-502111
    2024-08-30 17:05Codeforces Round 969 (Div. 1)437+172161
    2024-08-11 17:35EPIC Institute of Technology Round August 2024 (Div. 1 + Div. 2)1196-512144
    2024-07-28 17:35Pinely Round 4 (Div. 1 + Div. 2)901-362195
    2024-06-25 16:35Codeforces Round 955 (Div. 2, with prizes from NEAR!)16+1562231
    2024-05-25 17:35Codeforces Round 947 (Div. 1 + Div. 2)1535-862075
    2024-02-17 17:35think-cell Round 1742-222161