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yanchengzhi

Open on Codeforces · Unique solved

Rating2312· 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
15
Unique solved
930
Submissions (all)
2,489
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.

  • Unrated106
  • 800–89985
  • 900–99916
  • 1000–109917
  • 1100–119921
  • 1200–129915
  • 1300–139920

Solved by topic

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

  • greedy309
  • dp256
  • data structures249
  • math245
  • constructive algorithms203
  • implementation150

Rating changes

2021

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

2021

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2026-03-29 16:50Codeforces Round 1089 (Div. 2)2+2472312
2023-03-12 16:35Nebius Welcome Round (Div. 1 + Div. 2)1030-392065
2022-12-30 17:05Good Bye 2022: 2023 is NEAR530+752104
2022-10-23 12:05Codeforces Round 830 (Div. 2)63+1192029
2022-10-23 09:50Codeforces Round 829 (Div. 1)839
1400–1499
29
  • 1500–159924
  • 1600–169929
  • 1700–179932
  • 1800–189929
  • 1900–199936
  • 2000–209939
  • 2100–219927
  • 2200–229926
  • 2300–239936
  • 2400–249950
  • 2500–259944
  • 2600–269948
  • 2700–279929
  • 2800–289927
  • 2900–299921
  • 3000–309954
  • 3100–319930
  • 3200–329918
  • 3300–33999
  • 3400–34996
  • 3500–35997
  • brute force
    148
  • binary search113
  • graphs112
  • trees111
  • dfs and similar108
  • sortings100
  • number theory81
  • bitmasks78
  • combinatorics75
  • two pointers70
  • strings54
  • dsu48
  • divide and conquer46
  • probabilities28
  • interactive27
  • shortest paths26
  • games23
  • hashing21
  • fft19
  • matrices19
  • geometry14
  • string suffix structures9
  • Other (6 tags)31
  • Jun
    Jul
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    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.

    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
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    LessMore (max 15/day in 2021)

    2022

    Download PNG

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

    Jan
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    Jun
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    LessMore (max 47/day in 2022)

    2023

    Download PNG

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

    Jan
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    May
    Jun
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    LessMore (max 38/day in 2023)

    2024

    Download PNG

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

    Jan
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    Mar
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    May
    Jun
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    Dec

    LessMore (max 21/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 16/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 10/day in 2026)

    -58
    1910
    2022-10-15 16:50Codeforces Global Round 231415-331968
    2022-09-23 14:05Codeforces Round 822 (Div. 2)134+802001
    2022-06-25 16:50Codeforces Global Round 21663+821921
    2022-06-19 11:05Codeforces Round 802 (Div. 2)50+2211839
    2022-05-14 11:35Codeforces Round 791 (Div. 2)580+1461618
    2021-11-14 08:20Codeforces Round 755 (Div. 2, based on Technocup 2022 Elimination Round 2)1014+1121472
    2021-10-30 16:35Codeforces Round 752 (Div. 2)4223+711360