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hzt1

Open on Codeforces · Unique solved

Rating2264· 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
43
Unique solved
363
Submissions (all)
1,000
Years with activity
2014–2025

Solved by problem rating

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

  • Unrated40
  • 800–89917
  • 900–9998
  • 1000–10997
  • 1100–11997
  • 1200–12998
  • 1300–139914

Solved by topic

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

  • greedy116
  • math111
  • dp87
  • implementation74
  • constructive algorithms73
  • brute force66
  • data structures

Rating changes

2014

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2014

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2025-06-23 16:35Educational Codeforces Round 180 (Rated for Div. 2)1+3012264
2024-11-23 17:35CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)5094-2161963
2024-11-09 17:35Refact.ai Match 1 (Codeforces Round 985)891-492179
2024-10-27 17:35Codeforces Global Round 271672-1322228
2024-10-20 11:05Codeforces Round 980 (Div. 1)
1400–1499
20
  • 1500–159911
  • 1600–169914
  • 1700–179923
  • 1800–189914
  • 1900–199922
  • 2000–209919
  • 2100–219916
  • 2200–229917
  • 2300–239922
  • 2400–249918
  • 2500–259918
  • 2600–269913
  • 2700–279910
  • 2800–28999
  • 2900–29998
  • 3000–30993
  • 3100–31991
  • 3200–32992
  • 3300–33991
  • 3500–35991
  • 64
  • graphs50
  • dfs and similar48
  • binary search41
  • sortings41
  • trees40
  • number theory33
  • combinatorics26
  • bitmasks26
  • dsu23
  • two pointers20
  • divide and conquer19
  • strings17
  • geometry14
  • games12
  • shortest paths9
  • matrices8
  • hashing6
  • interactive6
  • string suffix structures3
  • graph matchings3
  • flows3
  • Other (7 tags)9
  • 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.

    2015

    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.

    2016

    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.

    2017

    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.

    2018

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
    Oct
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    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.

    2019

    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.

    2020

    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.

    2021

    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.

    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.

    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    LessMore (max 12/day in 2014)

    2015

    Download PNG

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

    Jan
    Feb
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    Apr
    May
    Jun
    Jul
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    LessMore (max 16/day in 2015)

    2016

    Download PNG

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

    Jan
    Feb
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    Apr
    May
    Jun
    Jul
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    LessMore (max 14/day in 2016)

    2017

    Download PNG

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

    Jan
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    LessMore (max 17/day in 2017)

    2018

    Download PNG

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

    Jan
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    Jun
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    LessMore (max 16/day in 2018)

    2019

    Download PNG

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

    Jan
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    LessMore (max 9/day in 2019)

    2020

    Download PNG

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

    Jan
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    Jun
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    LessMore (max 12/day in 2020)

    2021

    Download PNG

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

    Jan
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    LessMore (max 17/day in 2021)

    2023

    Download PNG

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

    Jan
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    LessMore (max 13/day in 2023)

    2024

    Download PNG

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

    Jan
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    May
    Jun
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    LessMore (max 52/day in 2024)

    2025

    Download PNG

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

    Jan
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    LessMore (max 6/day in 2025)

    394
    -38
    2360
    2024-09-27 16:05Codeforces Round 975 (Div. 1)250+122398
    2024-08-11 17:35EPIC Institute of Technology Round August 2024 (Div. 1 + Div. 2)189+712386
    2024-07-28 17:35Pinely Round 4 (Div. 1 + Div. 2)1607-1382315
    2024-06-09 17:35Codeforces Global Round 26237+162453
    2024-04-30 17:05Codeforces Round 942 (Div. 1)195+312437
    2024-04-27 16:35Codeforces Round 941 (Div. 1)345-242406
    2024-04-06 17:35Codeforces Global Round 2597+1242430