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Top rated · Stats

chimbunhatvn

Open on Codeforces · Unique solved

Rating2154· 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
16
Unique solved
818
Submissions (all)
2,176
Years with activity
2022–2026

Solved by problem rating

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

  • Unrated14
  • 800–89941
  • 900–9998
  • 1000–10998
  • 1100–11999
  • 1200–12992
  • 1300–13996

Solved by topic

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

  • math320
  • greedy312
  • dp287
  • data structures233
  • brute force186
  • implementation186
  • constructive algorithms

Rating changes

2022

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

Jan
Feb
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Apr
May

Submission volume

Download all years PNG

2022

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2025-11-23 12:35Codeforces Round 1066 (Div. 1 + Div. 2)1020-692154
2025-11-10 17:05Codeforces Round 1063 (Div. 2)3+2552223
2025-10-10 16:50Codeforces Round 1057 (Div. 2)403+271968
2025-10-03 17:35Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2)2740-941941
2025-09-24 14:50Codeforces Round 1053 (Div. 1)
1400–1499
18
  • 1500–159920
  • 1600–169923
  • 1700–179923
  • 1800–189920
  • 1900–199929
  • 2000–209924
  • 2100–219926
  • 2200–229912
  • 2300–239957
  • 2400–2499109
  • 2500–2599121
  • 2600–269975
  • 2700–279968
  • 2800–289945
  • 2900–299940
  • 3000–309911
  • 3100–31998
  • 3500–35991
  • 185
  • binary search148
  • combinatorics138
  • dfs and similar127
  • trees124
  • graphs123
  • sortings97
  • bitmasks96
  • number theory77
  • two pointers70
  • divide and conquer60
  • dsu59
  • interactive48
  • strings46
  • probabilities37
  • games33
  • shortest paths32
  • hashing31
  • geometry23
  • fft21
  • flows15
  • graph matchings12
  • Other (8 tags)54
  • 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.

    2023

    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.

    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 38/day in 2022)

    2023

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
    Oct
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    Dec

    LessMore (max 16/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 10/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 37/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 16/day in 2026)

    479
    +49
    2035
    2025-09-21 16:50Codeforces Round 1052 (Div. 2)355+271986
    2025-09-20 17:35Codeforces Global Round 29 (Div. 1 + Div. 2)4809-1731959
    2025-08-07 17:35Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2)675+82132
    2023-01-08 16:35Educational Codeforces Round 141 (Rated for Div. 2)117+482124
    2023-01-03 17:05Hello 2023972-102076
    2022-08-04 16:35Educational Codeforces Round 133 (Rated for Div. 2)172+952086
    2022-07-21 16:35Educational Codeforces Round 132 (Rated for Div. 2)347+1031991