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Top rated · Stats

jliu12

Open on Codeforces · Unique solved

Rating2157· 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
68
Unique solved
1,479
Submissions (all)
2,894
Years with activity
2021–2026

Solved by problem rating

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

  • Unrated81
  • 800–899396
  • 900–99986
  • 1000–109992
  • 1100–119992
  • 1200–129989
  • 1300–1399104

Solved by topic

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

  • greedy686
  • math589
  • implementation441
  • constructive algorithms385
  • brute force283
  • sortings237
  • dp

Rating changes

2021

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

2021

Download PNG

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

Jan
Feb
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Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2023-08-26 17:35Harbour.Space Scholarship Contest 2023-2024 (Div. 1 + Div. 2)263+962157
2023-08-17 16:35Educational Codeforces Round 153 (Rated for Div. 2)431-62061
2023-08-15 16:35Codeforces Round 893 (Div. 2)337+62067
2023-08-12 16:35Codeforces Round 892 (Div. 2)86+1082061
2023-07-29 17:05Codeforces Round 889 (Div. 1)
1400–1499
84
  • 1500–159975
  • 1600–169970
  • 1700–179972
  • 1800–189975
  • 1900–199964
  • 2000–209945
  • 2100–219919
  • 2200–229913
  • 2300–239912
  • 2400–24996
  • 2500–25993
  • 2700–27991
  • 211
  • data structures170
  • binary search154
  • strings143
  • number theory131
  • two pointers105
  • graphs92
  • bitmasks88
  • dfs and similar85
  • combinatorics73
  • trees57
  • dsu46
  • games42
  • geometry34
  • shortest paths25
  • interactive23
  • hashing17
  • divide and conquer11
  • ternary search10
  • flows10
  • *special9
  • probabilities8
  • Other (9 tags)29
  • 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.

    2022

    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.

    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 23/day in 2021)

    2022

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
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    Dec

    LessMore (max 39/day in 2022)

    2023

    Download PNG

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

    Jan
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    Apr
    May
    Jun
    Jul
    Aug
    Sep
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    Dec

    LessMore (max 21/day in 2023)

    2024

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
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    Dec

    LessMore (max 20/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 8/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 3/day in 2026)

    822
    -52
    1953
    2023-07-27 16:35Educational Codeforces Round 152 (Rated for Div. 2)162+722005
    2023-07-23 17:05Codeforces Round 887 (Div. 1)507+251933
    2023-07-11 17:35Codeforces Round 884 (Div. 1 + Div. 2)4495-1551908
    2023-07-06 16:50Codeforces Round 882 (Div. 2)50+1362063
    2023-06-29 16:35Educational Codeforces Round 151 (Rated for Div. 2)1286-601927
    2023-06-24 17:05CodeTON Round 5 (Div. 1 + Div. 2, Rated, Prizes!)895+81987
    2023-06-18 16:35Codeforces Round 880 (Div. 1)459+431979