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Top rated · Stats

zaixianmojulao

Open on Codeforces · Unique solved

Rating2288· 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
13
Unique solved
198
Submissions (all)
401
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.

  • 800–89936
  • 900–9998
  • 1000–10999
  • 1100–119911
  • 1200–129910
  • 1300–139913
  • 1400–14995

Solved by topic

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

  • greedy88
  • math65
  • constructive algorithms47
  • implementation44
  • brute force42
  • dp39
  • 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
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2023-09-24 16:35Educational Codeforces Round 155 (Rated for Div. 2)5+2022288
2023-09-11 16:35Codeforces Round 897 (Div. 2)68+1092086
2023-08-31 16:35Educational Codeforces Round 154 (Rated for Div. 2)148+1011977
2023-08-17 16:35Educational Codeforces Round 153 (Rated for Div. 2)1374-331876
2023-07-27 16:35Educational Codeforces Round 152 (Rated for Div. 2)
1500–1599
12
  • 1600–169913
  • 1700–179910
  • 1800–189915
  • 1900–199910
  • 2000–20999
  • 2100–21999
  • 2200–22994
  • 2300–23997
  • 2400–24996
  • 2500–25992
  • 2600–26991
  • 2700–27993
  • 2800–28994
  • 2900–29991
  • 39
  • dfs and similar29
  • binary search28
  • sortings28
  • trees27
  • graphs23
  • strings19
  • number theory18
  • two pointers16
  • combinatorics14
  • dsu12
  • bitmasks11
  • divide and conquer9
  • interactive7
  • games5
  • hashing2
  • shortest paths2
  • geometry2
  • *special1
  • ternary search1
  • meet-in-the-middle1
  • string suffix structures1
  • Other (2 tags)2
  • 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
    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
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    Jun
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    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
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    Dec

    LessMore (max 3/day in 2019)

    2020

    Download PNG

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

    Jan
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    LessMore (max 7/day in 2020)

    2021

    Download PNG

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

    Jan
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    LessMore (max 4/day in 2021)

    2022

    Download PNG

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

    Jan
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    LessMore (max 7/day in 2022)

    2023

    Download PNG

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

    Jan
    Feb
    Mar
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    May
    Jun
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    LessMore (max 14/day in 2023)

    2024

    Download PNG

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

    Jan
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    LessMore (max 4/day in 2024)

    2025

    Download PNG

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

    Jan
    Feb
    Mar
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    May
    Jun
    Jul
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    Sep
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    Dec

    LessMore (max 9/day in 2025)

    2026

    Download PNG

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

    Jan
    Feb
    Mar
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    May
    Jun
    Jul
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    LessMore (max 6/day in 2026)

    797
    -14
    1909
    2023-07-23 17:05Codeforces Round 887 (Div. 1)573-81923
    2023-06-18 10:05Codeforces Round 879 (Div. 2)34+1991931
    2023-03-26 16:35Codeforces Round 860 (Div. 2)1738+141732
    2023-03-18 14:20Codeforces Round 858 (Div. 2)35+3881718
    2023-03-04 19:35Codeforces Round 856 (Div. 2)5135+241330
    2023-02-27 17:35Codeforces Round 854 by cybercats (Div. 1 + Div. 2)982+3491306
    2023-02-05 15:05Codeforces Round 850 (Div. 2, based on VK Cup 2022 - Final Round)678+439957