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Top rated · Stats

Andrei_ierdnA

Open on Codeforces · Unique solved

Rating2449· 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
37
Unique solved
360
Submissions (all)
825
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.

  • Unrated10
  • 800–89943
  • 900–99910
  • 1000–10999
  • 1100–119911
  • 1200–12999
  • 1300–139912

Solved by topic

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

  • greedy152
  • math138
  • constructive algorithms106
  • data structures95
  • dp87
  • implementation81
  • brute force

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
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Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2025-12-27 17:35Good Bye 2025226+342449
2025-04-26 11:35Codeforces Round 1021 (Div. 1)570-1572415
2025-04-05 17:35Teza Round 1 (Codeforces Round 1015, Div. 1 + Div. 2)73+952572
2025-03-10 17:15Codeforces Round 1008 (Div. 1)193+02477
2025-01-04 17:05Hello 2025318
1400–1499
17
  • 1500–15998
  • 1600–16999
  • 1700–179915
  • 1800–189910
  • 1900–199923
  • 2000–209921
  • 2100–219915
  • 2200–229916
  • 2300–239919
  • 2400–249935
  • 2500–259913
  • 2600–26997
  • 2700–27999
  • 2800–289911
  • 2900–299921
  • 3000–30995
  • 3100–31992
  • 78
  • binary search66
  • graphs50
  • number theory48
  • dfs and similar44
  • sortings42
  • bitmasks41
  • trees39
  • combinatorics31
  • two pointers26
  • strings22
  • interactive20
  • dsu20
  • divide and conquer14
  • games14
  • shortest paths12
  • geometry11
  • chinese remainder theorem7
  • probabilities7
  • matrices6
  • flows6
  • hashing5
  • Other (8 tags)22
  • 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 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 18/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 33/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 28/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 17/day in 2026)

    -3
    2477
    2024-12-28 17:35Good Bye 2024: 2025 is NEAR174+582480
    2024-11-09 17:35Refact.ai Match 1 (Codeforces Round 985)181+422422
    2024-10-27 17:35Codeforces Global Round 2770+1702380
    2024-06-09 17:35Codeforces Global Round 26504+192210
    2023-10-22 13:05Codeforces Round 905 (Div. 2)9+1812191
    2023-09-30 17:35Codeforces Round 901 (Div. 1)564+292010
    2023-06-18 16:35Codeforces Round 880 (Div. 1)691-631981