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jiangxinyang

Open on Codeforces · Unique solved

Rating2257· 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
36
Unique solved
658
Submissions (all)
1,341
Years with activity
2023–2026

Solved by problem rating

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

  • Unrated86
  • 800–89980
  • 900–99916
  • 1000–109921
  • 1100–119924
  • 1200–129925
  • 1300–139923

Solved by topic

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

  • greedy238
  • math199
  • data structures147
  • dp142
  • implementation127
  • brute force127
  • constructive algorithms

Rating changes

2023

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2023

Download PNG

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

Jan
Feb
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Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2025-12-06 10:15Codeforces Round 1069 (Div. 1)55+2062257
2025-11-28 16:35Educational Codeforces Round 185 (Rated for Div. 2)12+2362051
2025-11-14 16:35Educational Codeforces Round 184 (Rated for Div. 2)425+891815
2025-10-10 16:50Codeforces Round 1057 (Div. 2)5220-1111726
2025-10-05 18:35Codeforces Round 1056 (Div. 2)
1400–1499
23
  • 1500–159926
  • 1600–169922
  • 1700–179946
  • 1800–189919
  • 1900–199929
  • 2000–209926
  • 2100–219927
  • 2200–229931
  • 2300–239930
  • 2400–249925
  • 2500–259920
  • 2600–269921
  • 2700–279913
  • 2800–28995
  • 2900–29995
  • 3000–30996
  • 3100–31993
  • 3200–32992
  • 3300–33991
  • 3400–34991
  • 3500–35992
  • 119
  • binary search91
  • dfs and similar88
  • trees73
  • sortings69
  • graphs68
  • bitmasks58
  • number theory57
  • strings52
  • combinatorics44
  • two pointers38
  • divide and conquer29
  • dsu25
  • hashing24
  • interactive22
  • games18
  • probabilities18
  • shortest paths16
  • geometry12
  • *special9
  • string suffix structures8
  • graph matchings7
  • Other (8 tags)22
  • 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
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    LessMore (max 15/day in 2023)

    2024

    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 23/day in 2024)

    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 34/day in 2025)

    2026

    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 2/day in 2026)

    281
    +90
    1837
    2025-09-21 16:50Codeforces Round 1052 (Div. 2)1032+241747
    2025-07-22 16:35Educational Codeforces Round 181 (Rated for Div. 2)1400+171723
    2025-05-24 16:35Codeforces Round 1026 (Div. 2)409+1321706
    2025-04-28 16:35Educational Codeforces Round 178 (Rated for Div. 2)1029+801574
    2025-04-26 11:35Codeforces Round 1021 (Div. 2)2433-521494
    2025-04-21 16:35Codeforces Round 1019 (Div. 2)928+1091546
    2025-04-08 16:50Codeforces Round 1016 (Div. 3)1984+371437