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luanmenglei

Open on Codeforces · Unique solved

Rating2320· 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
35
Unique solved
950
Submissions (all)
2,438
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.

  • Unrated77
  • 800–89990
  • 900–99921
  • 1000–109928
  • 1100–119929
  • 1200–129924
  • 1300–139934

Solved by topic

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

  • greedy348
  • math316
  • dp265
  • constructive algorithms219
  • data structures197
  • brute force177
  • implementation

Rating changes

2021

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

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Submission volume

Download all years PNG

2021

Download PNG

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

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Recent rated rounds

When (UTC)ContestRankΔNew
2025-11-23 12:35Codeforces Round 1066 (Div. 1 + Div. 2)146+972320
2025-09-24 14:50Codeforces Round 1053 (Div. 1)612-602223
2024-03-30 17:35CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)534-122283
2023-12-30 16:50Good Bye 202392+1902295
2023-10-22 09:05Codeforces Round 904 (Div. 2)73
1400–1499
23
  • 1500–159925
  • 1600–169923
  • 1700–179936
  • 1800–189925
  • 1900–199937
  • 2000–209930
  • 2100–219929
  • 2200–229923
  • 2300–239932
  • 2400–249947
  • 2500–259950
  • 2600–269940
  • 2700–279936
  • 2800–289939
  • 2900–299922
  • 3000–309928
  • 3100–319924
  • 3200–329927
  • 3300–339921
  • 3400–349912
  • 3500–359918
  • 157
  • binary search119
  • combinatorics115
  • sortings109
  • trees109
  • graphs104
  • dfs and similar92
  • bitmasks91
  • number theory78
  • two pointers71
  • divide and conquer43
  • strings41
  • dsu40
  • probabilities32
  • games28
  • shortest paths28
  • hashing26
  • geometry24
  • interactive21
  • flows20
  • matrices13
  • graph matchings9
  • Other (7 tags)33
  • Jun
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    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
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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
    Mar
    Apr
    May
    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
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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.

    2026

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
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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 1/day in 2021)

    2022

    Download PNG

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

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    LessMore (max 34/day in 2022)

    2023

    Download PNG

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

    Jan
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    Jun
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    LessMore (max 39/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 34/day in 2024)

    2025

    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 31/day in 2025)

    2026

    Download PNG

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

    Jan
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    LessMore (max 9/day in 2026)

    +84
    2105
    2023-10-09 16:35Educational Codeforces Round 156 (Rated for Div. 2)1285-792021
    2023-10-08 11:35Codeforces Round 902 (Div. 1, based on COMPFEST 15 - Final Round)582-142100
    2023-09-18 16:50CodeTON Round 6 (Div. 1 + Div. 2, Rated, Prizes!)487+572114
    2023-09-11 16:35Codeforces Round 897 (Div. 2)388-32057
    2023-09-10 16:35Codeforces Round 896 (Div. 1)731-572060
    2023-08-30 17:35Pinely Round 2 (Div. 1 + Div. 2)812-132117
    2023-08-05 16:35Codeforces Round 890 (Div. 2) supported by Constructor Institute95+732130