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lindongli2004

Open on Codeforces · Unique solved

Rating2178· 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
32
Unique solved
478
Submissions (all)
1,206
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.

  • Unrated230
  • 800–89930
  • 900–9999
  • 1000–10999
  • 1100–119915
  • 1200–12998
  • 1300–139912

Solved by topic

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

  • greedy107
  • math94
  • implementation69
  • constructive algorithms57
  • brute force55
  • dp54
  • data structures

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
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Recent rated rounds

When (UTC)ContestRankΔNew
2023-01-29 17:35TypeDB Forces 2023 (Div. 1 + Div. 2, Rated, Prizes!)966-632178
2022-12-27 16:35Codeforces Round 841 (Div. 2) and Divide by Zero 20227+2022241
2022-01-03 16:50Hello 20221663-682039
2021-12-29 17:35Good Bye 2021: 2022 is NEAR872-52107
2020-11-29 09:05Codeforces Round 687 (Div. 1, based on Technocup 2021 Elimination Round 2)
1400–1499
11
  • 1500–159914
  • 1600–169910
  • 1700–179920
  • 1800–189916
  • 1900–199914
  • 2000–209912
  • 2100–21997
  • 2200–229910
  • 2300–23999
  • 2400–24996
  • 2500–259910
  • 2600–26996
  • 2700–27999
  • 2800–28996
  • 2900–29992
  • 3200–32993
  • 51
  • sortings42
  • dfs and similar29
  • graphs26
  • trees26
  • number theory24
  • binary search24
  • two pointers21
  • bitmasks20
  • strings19
  • combinatorics13
  • shortest paths11
  • divide and conquer9
  • games8
  • probabilities7
  • dsu7
  • interactive6
  • geometry5
  • hashing5
  • ternary search4
  • fft3
  • string suffix structures3
  • Other (4 tags)4
  • Jun
    Jul
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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
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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.

    2020

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

    Jan
    Feb
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    Jun
    Jul
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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
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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
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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
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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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    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
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    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.

    May
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    LessMore (max 7/day in 2018)

    2019

    Download PNG

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

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    LessMore (max 16/day in 2019)

    2020

    Download PNG

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

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    2021

    Download PNG

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

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    2022

    Download PNG

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

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    LessMore (max 57/day in 2022)

    2023

    Download PNG

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

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    LessMore (max 19/day in 2023)

    2024

    Download PNG

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

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    LessMore (max 29/day in 2024)

    2025

    Download PNG

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

    Jan
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    2026

    Download PNG

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

    Jan
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    LessMore (max 2/day in 2026)

    178
    +143
    2112
    2020-11-15 17:05Codeforces Round 683 (Div. 1, by Meet IT)889-981969
    2020-11-01 13:05Codeforces Round 680 (Div. 1, based on Moscow Team Olympiad)633-372067
    2020-06-04 17:05Codeforces Round 647 (Div. 1) - Thanks, Algo Muse!599-132104
    2020-05-26 16:35Codeforces Round 645 (Div. 2)60+1302117
    2020-05-01 17:05Codeforces Round 638 (Div. 2)1026-141987
    2020-04-26 16:35Educational Codeforces Round 86 (Rated for Div. 2)235+942001
    2020-04-23 17:15Codeforces Round 637 (Div. 2) - Thanks, Ivan Belonogov!482+481907