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duckagainduck

Open on Codeforces · Unique solved

Rating2160· 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
26
Unique solved
105
Submissions (all)
224
Years with activity
2024–2026

Solved by problem rating

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

  • Unrated3
  • 800–89925
  • 900–9992
  • 1000–10996
  • 1100–119910
  • 1200–12995
  • 1300–13994

Solved by topic

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

  • greedy59
  • math50
  • brute force29
  • constructive algorithms29
  • dp26
  • sortings22
  • binary search

Rating changes

2024

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2024

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2025-12-19 17:05Codeforces Global Round 31 (Div. 1 + Div. 2)310+862160
2025-11-23 12:35Codeforces Round 1066 (Div. 1 + Div. 2)338+942074
2025-11-06 17:35Codeforces Global Round 30 (Div. 1 + Div. 2)1070-91980
2025-10-30 19:35Pinely Round 5 (Div. 1 + Div. 2)541+211989
2025-06-21 16:35Codeforces Round 1033 (Div. 2) and CodeNite 2025
1400–1499
7
  • 1500–15997
  • 1600–16996
  • 1700–17997
  • 1800–18993
  • 1900–19994
  • 2000–20992
  • 2100–21992
  • 2200–22992
  • 2300–23993
  • 2400–24992
  • 2500–25991
  • 2600–26992
  • 2700–27991
  • 2900–29991
  • 19
  • data structures18
  • implementation18
  • number theory12
  • bitmasks9
  • dfs and similar9
  • trees8
  • graphs8
  • strings7
  • dsu6
  • two pointers6
  • divide and conquer5
  • games5
  • geometry3
  • combinatorics3
  • ternary search2
  • matrices2
  • shortest paths2
  • chinese remainder theorem1
  • fft1
  • interactive1
  • probabilities1
  • Other (4 tags)4
  • 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 4/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 12/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 20/day in 2026)

    1992
    -96
    1968
    2025-05-31 16:35Codeforces Round 1028 (Div. 1)258+1462064
    2025-05-05 16:50Codeforces Round 1023 (Div. 2)152+1081918
    2025-04-28 16:35Educational Codeforces Round 178 (Rated for Div. 2)889+51810
    2025-04-26 11:35Codeforces Round 1021 (Div. 2)702-241805
    2025-04-19 16:35Neowise Labs Contest 1 (Codeforces Round 1018, Div. 1 + Div. 2)1874-91829
    2025-04-05 17:35Teza Round 1 (Codeforces Round 1015, Div. 1 + Div. 2)339+2001838
    2025-04-03 16:35Educational Codeforces Round 177 (Rated for Div. 2)1964+101638