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Top rated · Stats

shanxizeng

Open on Codeforces · Unique solved

Rating2173· 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
30
Unique solved
268
Submissions (all)
662
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.

  • Unrated8
  • 800–89927
  • 900–9999
  • 1000–109910
  • 1100–11997
  • 1200–129912
  • 1300–139913

Solved by topic

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

  • greedy102
  • math73
  • implementation72
  • constructive algorithms61
  • dp47
  • data structures38
  • brute force

Rating changes

2018

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

2018

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2020-07-24 16:35Codeforces Round 659 (Div. 1)1095-1082173
2019-06-07 14:05Codeforces Round 564 (Div. 1)76+952281
2019-06-01 16:50Codeforces Global Round 3321+152186
2019-05-12 16:35Codeforces Round 559 (Div. 1)293-702171
2019-04-29 16:35Codeforces Round 556 (Div. 1)352
1400–1499
18
  • 1500–159919
  • 1600–169922
  • 1700–179922
  • 1800–189912
  • 1900–199912
  • 2000–209916
  • 2100–21996
  • 2200–229912
  • 2300–23998
  • 2400–24999
  • 2500–25998
  • 2600–26993
  • 2700–27994
  • 2800–28992
  • 2900–29992
  • 3000–30991
  • 3100–31993
  • 3200–32991
  • 3300–33991
  • 3400–34991
  • 37
  • sortings34
  • binary search28
  • graphs26
  • dfs and similar22
  • trees21
  • bitmasks19
  • strings18
  • number theory16
  • combinatorics11
  • dsu9
  • interactive9
  • two pointers8
  • shortest paths7
  • divide and conquer6
  • games5
  • hashing5
  • geometry4
  • probabilities4
  • flows3
  • fft3
  • string suffix structures2
  • Other (4 tags)4
  • 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.

    2019

    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.

    2020

    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.

    2021

    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.

    2022

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    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
    Feb
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    Apr
    May
    Jun
    Jul
    Aug
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    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.

    May
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    Dec

    LessMore (max 25/day in 2018)

    2019

    Download PNG

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

    Jan
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    LessMore (max 26/day in 2019)

    2020

    Download PNG

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

    Jan
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    LessMore (max 10/day in 2020)

    2021

    Download PNG

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

    Jan
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    May
    Jun
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    LessMore (max 9/day in 2021)

    2022

    Download PNG

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

    Jan
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    May
    Jun
    Jul
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    LessMore (max 16/day in 2022)

    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 10/day in 2025)

    2026

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
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    Dec

    LessMore (max 8/day in 2026)

    -48
    2241
    2019-03-08 11:35Codeforces Round 545 (Div. 1)100+402289
    2019-02-24 17:35Codeforces Round 542 [Alex Lopashev Thanks-Round] (Div. 1)57+1072249
    2019-02-07 15:35Codeforces Global Round 1463+152142
    2019-01-22 16:35Codeforces Round 534 (Div. 1)215+112127
    2019-01-13 16:35Codeforces Round 532 (Div. 2)37+1112116
    2019-01-05 19:05Codeforces Round 530 (Div. 1)442-532005
    2019-01-04 17:45Hello 2019460+432058