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Alexander-21

Open on Codeforces · Unique solved

Rating2139· 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
50
Unique solved
716
Submissions (all)
2,646
Years with activity
2023–2026

Solved by problem rating

Unique accepted problems, bucketed by catalog rating (100‑point bands). Unrated = no rating in the problem set.

  • Unrated54
  • 800–89986
  • 900–99921
  • 1000–109916
  • 1100–119925
  • 1200–129922
  • 1300–139921

Solved by topic

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

  • greedy327
  • math254
  • constructive algorithms194
  • dp183
  • implementation143
  • brute force140
  • graphs

Rating changes

2023

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2023

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2026-05-06 08:35Codeforces Round 1097 (Div. 1, Based on Zhili Cup 2026)358-582139
2026-04-25 17:05Spectral::Cup 2026 Round 1 (Codeforces Round 1094, Div. 1 + Div. 2)392+212197
2026-01-23 16:35Codeforces Round 1075 (Div. 2)61+792176
2026-01-17 17:35Codeforces Round 1073 (Div. 1)693-602097
2025-12-27 17:35Good Bye 2025
1400–1499
28
  • 1500–159938
  • 1600–169947
  • 1700–179966
  • 1800–189934
  • 1900–199958
  • 2000–209930
  • 2100–219946
  • 2200–229920
  • 2300–239930
  • 2400–249920
  • 2500–259926
  • 2600–269911
  • 2700–27997
  • 2800–28993
  • 3000–30992
  • 3100–31992
  • 3200–32992
  • 3300–33991
  • 128
  • data structures126
  • sortings110
  • dfs and similar108
  • binary search91
  • trees78
  • number theory68
  • bitmasks66
  • combinatorics65
  • games52
  • two pointers51
  • dsu50
  • strings40
  • interactive31
  • shortest paths25
  • divide and conquer24
  • probabilities14
  • *special9
  • geometry8
  • hashing8
  • graph matchings5
  • flows5
  • Other (9 tags)18
  • 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 27/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 26/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 84/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 32/day in 2026)

    643
    +25
    2157
    2025-11-06 17:35Codeforces Global Round 30 (Div. 1 + Div. 2)663-32132
    2025-10-30 19:35Pinely Round 5 (Div. 1 + Div. 2)525-222135
    2025-10-03 17:35Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2)585+202157
    2025-09-20 17:35Codeforces Global Round 29 (Div. 1 + Div. 2)392+842137
    2025-08-28 17:35Codeforces Round 1046 (Div. 1)431+472053
    2025-08-07 17:35Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2)471+942006
    2025-07-27 16:35Codeforces Round 1039 (Div. 2)768-11912