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Top rated · Stats

huyhau6a2

Open on Codeforces · Unique solved

Rating2190· 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
6
Unique solved
47
Submissions (all)
75
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.

  • 800–89912
  • 900–9994
  • 1000–10991
  • 1100–11992
  • 1200–12994
  • 1300–13993
  • 1400–14992

Solved by topic

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

  • math24
  • implementation17
  • greedy14
  • dp13
  • brute force12
  • sortings9
  • data structures

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
2024-02-11 11:35Codeforces Round 924 (Div. 2)9+2442190
2023-10-22 13:05Codeforces Round 905 (Div. 2)477+611946
2023-08-05 16:35Codeforces Round 890 (Div. 2) supported by Constructor Institute838+991885
2023-07-21 16:35Codeforces Round 886 (Div. 4)1+4901786
2023-07-07 16:50Codeforces Round 883 (Div. 3)
1500–1599
2
  • 1600–16993
  • 1700–17991
  • 1800–18994
  • 1900–19993
  • 2000–20991
  • 2100–21991
  • 2300–23993
  • 2400–24991
  • 9
  • binary search8
  • trees7
  • graphs6
  • dfs and similar6
  • number theory6
  • constructive algorithms5
  • geometry5
  • two pointers4
  • strings3
  • combinatorics3
  • bitmasks2
  • ternary search1
  • dsu1
  • shortest paths1
  • interactive1
  • divide and conquer1
  • 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.

    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 19/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 9/day in 2024)

    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 8/day in 2026)

    23
    +526
    1296
    2023-06-20 16:50Codeforces Round 881 (Div. 3)17+770770