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hcy1394

Open on Codeforces · Unique solved

Rating2118· 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
18
Unique solved
109
Submissions (all)
173
Years with activity
2018–2026

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
  • 1000–10994
  • 1100–11996
  • 1200–12996
  • 1300–13997
  • 1400–149910

Solved by topic

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

  • greedy44
  • math41
  • implementation38
  • data structures20
  • dp18
  • sortings18
  • constructive algorithms

Rating changes

2018

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2018

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2020-08-21 16:35Codeforces Round 665 (Div. 2)117+762118
2020-06-13 17:05Codeforces Round 649 (Div. 2)461+212042
2019-11-29 16:35Codeforces Round 603 (Div. 2)79+1092021
2019-08-11 14:35Codeforces Round 578 (Div. 2)84+1571912
2019-07-22 16:35Educational Codeforces Round 69 (Rated for Div. 2)
1500–1599
7
  • 1600–16994
  • 1700–17991
  • 1800–18999
  • 1900–19995
  • 2000–20995
  • 2100–219910
  • 2200–22994
  • 2300–23993
  • 2400–24998
  • 2500–25993
  • 2800–28991
  • 16
  • binary search15
  • brute force15
  • number theory13
  • combinatorics10
  • trees10
  • two pointers9
  • dfs and similar9
  • strings8
  • dsu5
  • games5
  • bitmasks4
  • divide and conquer4
  • graphs4
  • probabilities2
  • interactive2
  • meet-in-the-middle2
  • graph matchings1
  • geometry1
  • hashing1
  • string suffix structures1
  • fft1
  • Other (2 tags)2
  • 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.

    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.

    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 5/day in 2018)

    2019

    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 12/day in 2019)

    2020

    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 2020)

    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 2/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 2/day in 2026)

    843
    +17
    1755
    2019-07-17 16:35Codeforces Round 574 (Div. 2)608+541738
    2019-07-14 16:45Educational Codeforces Round 68 (Rated for Div. 2)1349-131684
    2019-07-12 16:35Codeforces Round 573 (Div. 2)279+1101697
    2019-07-05 17:05Codeforces Round 572 (Div. 2)2128-541587
    2019-06-30 16:45Educational Codeforces Round 67 (Rated for Div. 2)524+911641
    2019-06-19 17:00Codeforces Round 568 (Div. 2)3856-981550
    2019-06-07 14:05Codeforces Round 564 (Div. 2)757+281648