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Coder-Osman

Open on Codeforces · Unique solved

Rating2136· 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
85
Unique solved
636
Submissions (all)
1,564
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.

  • Unrated6
  • 800–89988
  • 900–99920
  • 1000–109917
  • 1100–119931
  • 1200–129919
  • 1300–139919

Solved by topic

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

  • greedy288
  • math278
  • dp197
  • data structures185
  • brute force156
  • constructive algorithms155
  • implementation

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
2025-05-31 16:35Codeforces Round 1028 (Div. 1)316+732136
2025-05-24 16:35Codeforces Round 1026 (Div. 2)92+982063
2025-05-11 17:05Codeforces Round 1024 (Div. 2)82+981965
2025-05-05 16:50Codeforces Round 1023 (Div. 2)3317-1321867
2025-04-28 16:35Educational Codeforces Round 178 (Rated for Div. 2)
1400–1499
26
  • 1500–159915
  • 1600–169920
  • 1700–179930
  • 1800–189928
  • 1900–199933
  • 2000–209925
  • 2100–219924
  • 2200–229927
  • 2300–239945
  • 2400–249936
  • 2500–259939
  • 2600–269930
  • 2700–279922
  • 2800–289912
  • 2900–29999
  • 3000–30996
  • 3100–31994
  • 3200–32992
  • 3400–34991
  • 3500–35992
  • 154
  • binary search114
  • sortings99
  • graphs90
  • trees86
  • dfs and similar85
  • combinatorics70
  • number theory65
  • bitmasks62
  • two pointers54
  • strings44
  • dsu41
  • divide and conquer39
  • games26
  • hashing20
  • interactive17
  • probabilities16
  • shortest paths14
  • matrices13
  • geometry8
  • string suffix structures7
  • graph matchings6
  • Other (8 tags)28
  • 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 7/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 17/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 29/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 18/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 2/day in 2026)

    188
    +60
    1999
    2025-04-26 11:35Codeforces Round 1021 (Div. 2)136+501939
    2025-04-19 16:35Neowise Labs Contest 1 (Codeforces Round 1018, Div. 1 + Div. 2)1460+31889
    2025-04-05 17:35Teza Round 1 (Codeforces Round 1015, Div. 1 + Div. 2)1750-311886
    2025-03-29 16:35Codeforces Round 1014 (Div. 2)4400-1391917
    2025-03-17 16:35Educational Codeforces Round 176 (Rated for Div. 2)531-152056
    2025-03-10 17:15Codeforces Round 1008 (Div. 1)247+1392071
    2025-02-02 16:35Codeforces Round 1002 (Div. 2)2646-1001932