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duoluoluo

Open on Codeforces · Unique solved

Rating2170· 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
52
Unique solved
1,176
Submissions (all)
2,481
Years with activity
2019–2026

Solved by problem rating

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

  • Unrated186
  • 800–899192
  • 900–99948
  • 1000–109939
  • 1100–119950
  • 1200–129940
  • 1300–139943

Solved by topic

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

  • greedy482
  • math408
  • constructive algorithms314
  • implementation249
  • dp239
  • brute force235
  • data structures

Rating changes

2019

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

2019

Download PNG

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

Jan
Feb
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Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2025-11-16 16:35Codeforces Round 1064 (Div. 1)422-72170
2025-11-06 17:35Codeforces Global Round 30 (Div. 1 + Div. 2)855-462177
2025-07-31 17:35Codeforces Round 1040 (Div. 1)220+882223
2024-11-09 17:35Refact.ai Match 1 (Codeforces Round 985)564+202135
2023-03-23 16:35Educational Codeforces Round 145 (Rated for Div. 2)
1400–1499
43
  • 1500–159935
  • 1600–169942
  • 1700–179950
  • 1800–189944
  • 1900–199960
  • 2000–209948
  • 2100–219937
  • 2200–229943
  • 2300–239943
  • 2400–249949
  • 2500–259941
  • 2600–269919
  • 2700–279915
  • 2800–28995
  • 2900–29993
  • 3000–30991
  • 209
  • sortings142
  • binary search141
  • dfs and similar105
  • number theory102
  • graphs95
  • bitmasks94
  • trees91
  • two pointers82
  • strings77
  • combinatorics77
  • dsu56
  • games35
  • interactive33
  • divide and conquer27
  • shortest paths27
  • geometry20
  • probabilities19
  • hashing18
  • matrices12
  • ternary search10
  • flows10
  • Other (9 tags)40
  • 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
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    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.

    2022

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    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.

    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
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    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.

    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.

    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.

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    LessMore (max 1/day in 2019)

    2021

    Download PNG

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

    Jan
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    LessMore (max 21/day in 2021)

    2022

    Download PNG

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

    Jan
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    LessMore (max 68/day in 2022)

    2023

    Download PNG

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

    Jan
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    LessMore (max 20/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 70/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 22/day in 2025)

    2026

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
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    Dec

    LessMore (max 5/day in 2026)

    81
    +62
    2115
    2022-12-16 16:35Educational Codeforces Round 140 (Rated for Div. 2)117+732053
    2022-12-15 17:05Codeforces Round 838 (Div. 2)264+341980
    2022-12-12 16:35Educational Codeforces Round 139 (Rated for Div. 2)363+151946
    2022-10-29 11:55Codeforces Round 831 (Div. 1 + Div. 2)620+291931
    2022-10-20 16:35Educational Codeforces Round 138 (Rated for Div. 2)152+1031902
    2022-10-17 16:35Educational Codeforces Round 137 (Rated for Div. 2)1197-221799
    2022-10-15 16:50Codeforces Global Round 23873+871821