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nullbrain_

Open on Codeforces · Unique solved

Rating2410· 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
9
Unique solved
33
Submissions (all)
70
Years with activity
2026–2026

Solved by problem rating

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

  • Unrated6
  • 800–8996
  • 900–9991
  • 1000–10992
  • 1100–11991
  • 1300–13992
  • 1400–14992

Solved by topic

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

  • greedy16
  • math15
  • constructive algorithms12
  • dp8
  • brute force6
  • implementation6
  • trees

Rating changes

2026

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2026

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)30+2192410
2026-04-13 16:35Codeforces Round 1093 (Div. 1)79+2042191
2026-04-07 16:50Codeforces Round 1091 (Div. 2) and CodeCraft 2687+1371987
2026-03-29 16:50Codeforces Round 1089 (Div. 2)661+811850
2026-03-28 17:15Nebius Round 2 (Codeforces Round 1088, Div. 1 + Div. 2)
1600–1699
2
  • 1800–18993
  • 1900–19991
  • 2000–20991
  • 2100–21991
  • 2200–22992
  • 2300–23991
  • 2600–26991
  • 2700–27991
  • 6
  • data structures4
  • dfs and similar4
  • games4
  • combinatorics3
  • binary search3
  • interactive3
  • number theory3
  • graphs3
  • sortings3
  • bitmasks2
  • divide and conquer2
  • probabilities2
  • strings2
  • chinese remainder theorem1
  • hashing1
  • string suffix structures1
  • graph matchings1
  • dsu1
  • matrices1
  • shortest paths1
  • Jun
    Jul
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    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
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    Aug
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    Dec

    LessMore (max 10/day in 2026)

    541
    +236
    1769
    2026-03-21 16:35Codeforces Round 1087 (Div. 2)1060+1921533
    2026-03-16 16:50Educational Codeforces Round 188 (Rated for Div. 2)1543+2611341
    2026-03-14 16:35Codeforces Round 1086 (Div. 2)1597+3771080
    2026-03-08 17:35Codeforces Round 1085 (Div. 1 + Div. 2)434+703703