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hxz12345

Open on Codeforces · Unique solved

Rating2343· International 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
15
Unique solved
352
Submissions (all)
1,039
Years with activity
2018–2025

Solved by problem rating

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

  • Unrated4
  • 800–89938
  • 900–99910
  • 1000–109912
  • 1100–119915
  • 1200–129913
  • 1300–139912

Solved by topic

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

  • math128
  • greedy105
  • data structures94
  • dp84
  • implementation69
  • constructive algorithms67
  • brute force

Rating changes

2018

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

Jan
Feb
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May

Submission volume

Download all years PNG

2018

Download PNG

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

Jan
Feb
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Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2022-07-16 16:35Codeforces Round 808 (Div. 1)129+872343
2022-04-23 17:05Codeforces Global Round 20324+482256
2022-04-19 16:35Codeforces Round 783 (Div. 1)160+1292208
2022-04-17 16:50Codeforces Round 782 (Div. 2)121+552079
2022-04-08 16:35Codeforces Round 781 (Div. 2)223
1400–1499
12
  • 1500–159912
  • 1600–169917
  • 1700–179914
  • 1800–189918
  • 1900–199917
  • 2000–209931
  • 2100–219921
  • 2200–229923
  • 2300–239918
  • 2400–249919
  • 2500–259912
  • 2600–269913
  • 2700–27994
  • 2800–28995
  • 2900–29994
  • 3000–30995
  • 3200–32991
  • 3500–35992
  • 66
  • binary search48
  • dfs and similar44
  • sortings43
  • number theory43
  • graphs39
  • trees38
  • combinatorics36
  • bitmasks31
  • strings17
  • divide and conquer16
  • shortest paths16
  • two pointers16
  • dsu13
  • probabilities10
  • interactive10
  • geometry9
  • games8
  • hashing6
  • string suffix structures5
  • graph matchings5
  • matrices4
  • Other (5 tags)9
  • Jun
    Jul
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    Sep
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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
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    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.

    2020

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
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    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.

    2021

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
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    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.

    2022

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

    Jan
    Feb
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    Jun
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    Aug
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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.

    2024

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

    Jan
    Feb
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    Jun
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    Aug
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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.

    2025

    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.

    May
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    LessMore (max 7/day in 2018)

    2019

    Download PNG

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

    Jan
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    LessMore (max 1/day in 2019)

    2020

    Download PNG

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

    Jan
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    LessMore (max 2/day in 2020)

    2021

    Download PNG

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

    Jan
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    LessMore (max 23/day in 2021)

    2022

    Download PNG

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

    Jan
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    Jun
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    LessMore (max 33/day in 2022)

    2024

    Download PNG

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

    Jan
    Feb
    Mar
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    May
    Jun
    Jul
    Aug
    Sep
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    LessMore (max 12/day in 2024)

    2025

    Download PNG

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

    Jan
    Feb
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    May
    Jun
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    LessMore (max 4/day in 2025)

    +20
    2024
    2022-03-27 16:35Codeforces Round 779 (Div. 2)371-32004
    2022-03-24 16:35CodeTON Round 1 (Div. 1 + Div. 2, Rated, Prizes!)252+1762007
    2022-03-22 16:45Educational Codeforces Round 125 (Rated for Div. 2)13032-2461831
    2022-03-20 13:50Codeforces Round 778 (Div. 1 + Div. 2, based on Technocup 2022 Final Round)510+412077
    2022-03-06 12:10Codeforces Round 775 (Div. 1, based on Moscow Open Olympiad in Informatics)571+262036
    2022-02-23 12:10Codeforces Round 773 (Div. 2)16+2562010
    2022-02-12 17:05Codeforces Global Round 19923+1951754