CF Elite Tracker
TopExploreDivisionsLearnPracticeUser solvedHelp
HelpLog inSign up

Top rated · Stats

OtterZ

Open on Codeforces · Unique solved

Rating2141· 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
15
Unique solved
641
Submissions (all)
2,228
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.

  • Unrated9
  • 800–89926
  • 900–9997
  • 1000–109912
  • 1100–119910
  • 1200–129914
  • 1300–13998

Solved by topic

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

  • data structures227
  • dp215
  • greedy197
  • math177
  • implementation116
  • constructive algorithms111
  • graphs

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
2026-01-07 17:35Hello 2026463+562141
2025-10-03 17:35Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2)2213-1122085
2025-07-31 17:35Codeforces Round 1040 (Div. 1)649-642197
2024-12-03 08:25Codeforces Round 990 (Div. 1)121+1102261
2024-10-06 08:05Codeforces Round 977 (Div. 2, based on COMPFEST 16 - Final Round)
1400–1499
11
  • 1500–159912
  • 1600–169912
  • 1700–179914
  • 1800–189915
  • 1900–199937
  • 2000–209935
  • 2100–219940
  • 2200–229942
  • 2300–239941
  • 2400–249952
  • 2500–259943
  • 2600–269939
  • 2700–279933
  • 2800–289929
  • 2900–299920
  • 3000–309923
  • 3100–319913
  • 3200–329912
  • 3300–339915
  • 3400–34997
  • 3500–359910
  • 110
  • trees107
  • brute force106
  • binary search96
  • dfs and similar90
  • sortings74
  • combinatorics70
  • bitmasks70
  • strings63
  • number theory50
  • dsu46
  • divide and conquer41
  • two pointers40
  • flows32
  • probabilities31
  • interactive30
  • string suffix structures27
  • hashing24
  • shortest paths23
  • matrices18
  • graph matchings15
  • fft13
  • Other (8 tags)47
  • 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.

    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.

    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 3/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 17/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 30/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 23/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 44/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 16/day in 2026)

    21
    +168
    2151
    2024-09-27 16:05Codeforces Round 975 (Div. 1)797-171983
    2024-08-04 16:35Codeforces Round 963 (Div. 2)325+442000
    2024-07-20 16:35Codeforces Round 960 (Div. 2)1477-631956
    2024-06-09 17:35Codeforces Global Round 261325-342019
    2024-04-30 17:05Codeforces Round 942 (Div. 2)41+1672053
    2024-02-23 16:35Educational Codeforces Round 162 (Rated for Div. 2)108+2401886
    2024-01-27 16:45Codeforces Round 921 (Div. 2)117+3751646