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Acheronlt

Open on Codeforces · Unique solved

Rating2553· 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
11
Unique solved
98
Submissions (all)
171
Years with activity
2025–2026

Solved by problem rating

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

  • Unrated13
  • 800–8999
  • 900–9991
  • 1000–10993
  • 1100–11992
  • 1200–12992
  • 1300–13994

Solved by topic

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

  • dp40
  • math36
  • greedy35
  • data structures28
  • binary search16
  • constructive algorithms16
  • graphs

Rating changes

2025

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2025

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)185-192553
2026-04-13 16:35Codeforces Round 1093 (Div. 1)64+622572
2026-03-28 17:15Nebius Round 2 (Codeforces Round 1088, Div. 1 + Div. 2)153+202510
2026-03-08 17:35Codeforces Round 1085 (Div. 1 + Div. 2)36+1462490
2026-02-26 17:05Codeforces Round 1083 (Div. 2)
1500–1599
3
  • 1600–16994
  • 1700–17995
  • 1800–18991
  • 2000–20995
  • 2100–21993
  • 2200–22992
  • 2300–23993
  • 2400–24992
  • 2500–25994
  • 2600–26993
  • 2700–27993
  • 2800–28992
  • 2900–29997
  • 3000–30998
  • 3100–31992
  • 3200–32991
  • 3300–33993
  • 3400–34991
  • 3500–35992
  • 15
  • bitmasks14
  • combinatorics14
  • implementation13
  • brute force12
  • trees11
  • dfs and similar10
  • number theory9
  • dsu8
  • strings8
  • divide and conquer7
  • sortings7
  • interactive6
  • games5
  • string suffix structures4
  • fft3
  • two pointers3
  • matrices2
  • flows2
  • graph matchings2
  • shortest paths2
  • hashing2
  • Other (7 tags)8
  • 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 3/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 15/day in 2026)

    22
    +69
    2344
    2026-02-25 16:35Educational Codeforces Round 187 (Rated for Div. 2)23+1512275
    2026-02-23 17:05Codeforces Round 1082 (Div. 2)7+2622124
    2026-02-21 16:35Codeforces Round 1081 (Div. 2)425+1461862
    2026-02-15 17:15Codeforces Round 1080 (Div. 3)156+2621716
    2026-02-11 17:35Codeforces Round 1079 (Div. 2)31+5051454
    2026-02-08 11:05Codeforces Round 1078 (Div. 2)2+949949