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dandelayer

Open on Codeforces · Unique solved

Rating2352· International 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
27
Unique solved
131
Submissions (all)
220
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.

  • Unrated5
  • 800–89926
  • 900–9993
  • 1000–10996
  • 1100–11999
  • 1200–12998
  • 1300–13999

Solved by topic

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

  • greedy80
  • math57
  • constructive algorithms43
  • dp33
  • sortings22
  • implementation21
  • brute force

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
2026-04-25 17:05Spectral::Cup 2026 Round 1 (Codeforces Round 1094, Div. 1 + Div. 2)501-562352
2026-03-08 17:35Codeforces Round 1085 (Div. 1 + Div. 2)177+122408
2026-02-11 17:35Codeforces Round 1079 (Div. 1)220-52396
2026-01-17 17:35Codeforces Round 1073 (Div. 1)319-342401
2026-01-07 17:35Hello 2026
1400–1499
4
  • 1500–15996
  • 1600–16997
  • 1700–17999
  • 1800–18994
  • 1900–19999
  • 2000–20996
  • 2100–21997
  • 2200–22992
  • 2300–23995
  • 2400–24991
  • 2500–25993
  • 2800–28991
  • 2900–29991
  • 20
  • data structures18
  • number theory16
  • two pointers14
  • binary search12
  • games12
  • dfs and similar10
  • strings10
  • bitmasks9
  • combinatorics9
  • interactive7
  • trees7
  • graphs7
  • geometry5
  • shortest paths2
  • divide and conquer2
  • flows2
  • probabilities2
  • ternary search2
  • hashing2
  • expression parsing1
  • dsu1
  • 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 13/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 7/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 11/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 14/day in 2026)

    349
    -12
    2435
    2025-12-19 17:05Codeforces Global Round 31 (Div. 1 + Div. 2)91+1142447
    2025-12-06 10:15Codeforces Round 1069 (Div. 1)319-442333
    2025-11-16 16:35Codeforces Round 1064 (Div. 1)287-192377
    2025-10-03 17:35Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2)80+1492396
    2025-09-20 17:35Codeforces Global Round 29 (Div. 1 + Div. 2)410+392247
    2025-07-19 16:50Order Capital Round 1 (Codeforces Round 1038, Div. 1 + Div. 2)781-162208
    2025-07-06 17:35EPIC Institute of Technology Round Summer 2025 (Codeforces Round 1036, Div. 1 + Div. 2)231+792224