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laofudasuan

Open on Codeforces · Unique solved

Rating2682· International Grandmaster

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
12
Unique solved
406
Submissions (all)
1,238
Years with activity
2016–2026

Solved by problem rating

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

  • Unrated45
  • 800–8997
  • 900–9996
  • 1000–10991
  • 1100–11994
  • 1200–12996
  • 1300–139911

Solved by topic

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

  • dp101
  • data structures86
  • math86
  • graphs65
  • greedy63
  • implementation50
  • constructive algorithms

Rating changes

2016

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

2016

Download PNG

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

Jan
Feb
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Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2018-08-19 15:50Codeforces Round 505 (rated, Div. 1 + Div. 2, based on VK Cup 2018 Final)32+312682
2018-08-11 15:35Codeforces Round 503 (by SIS, Div. 1)31+292651
2018-07-13 16:45Codeforces Round 497 (Div. 1)37+222622
2018-02-15 16:35ICM Technex 2018 and Codeforces Round 463 (Div. 1 + Div. 2, combined)4+2302600
2018-02-14 14:05Codeforces Round 462 (Div. 1)
1400–1499
8
  • 1500–159911
  • 1600–169914
  • 1700–179913
  • 1800–189913
  • 1900–199911
  • 2000–209913
  • 2100–219911
  • 2200–229921
  • 2300–239912
  • 2400–249924
  • 2500–259920
  • 2600–269924
  • 2700–279923
  • 2800–289919
  • 2900–299928
  • 3000–309913
  • 3100–319918
  • 3200–329917
  • 3300–33996
  • 3400–34996
  • 3500–35991
  • 48
  • brute force43
  • trees42
  • dfs and similar36
  • combinatorics33
  • binary search30
  • sortings26
  • number theory26
  • bitmasks23
  • divide and conquer22
  • geometry17
  • shortest paths16
  • dsu15
  • matrices15
  • probabilities15
  • strings14
  • flows11
  • games11
  • fft10
  • two pointers8
  • interactive7
  • *special7
  • Other (6 tags)17
  • 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.

    2017

    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.

    2018

    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.

    2019

    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.

    2023

    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.

    2024

    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.

    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
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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.

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    LessMore (max 3/day in 2016)

    2017

    Download PNG

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

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    LessMore (max 51/day in 2017)

    2018

    Download PNG

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

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    LessMore (max 33/day in 2018)

    2019

    Download PNG

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

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    LessMore (max 8/day in 2019)

    2023

    Download PNG

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

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    2024

    Download PNG

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

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    LessMore (max 1/day in 2024)

    2025

    Download PNG

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

    Jan
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    LessMore (max 15/day in 2025)

    2026

    Download PNG

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

    Jan
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    LessMore (max 1/day in 2026)

    95
    +6
    2370
    2017-10-15 10:05Codeforces Round 440 (Div. 1, based on Technocup 2018 Elimination Round 2)80-232364
    2017-10-05 10:05Codeforces Round 438 by Sberbank and Barcelona Bootcamp (Div. 1 + Div. 2 combined)60+422387
    2017-09-06 14:55Codeforces Round 433 (Div. 1, based on Olympiad of Metropolises)14+2152345
    2017-09-01 15:35Codeforces Round 431 (Div. 1)582-1222130
    2017-08-18 17:05Codeforces Round 429 (Div. 1)13+2922252
    2017-08-12 16:35Codeforces Round 428 (Div. 2)33+1331960
    2017-05-27 11:35Codeforces Round 416 (Div. 2)4+18271827