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Xiaozzz

Open on Codeforces · Unique solved

Rating2118· 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
52
Unique solved
1,083
Submissions (all)
2,687
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.

  • Unrated153
  • 800–89984
  • 900–99918
  • 1000–109914
  • 1100–119930
  • 1200–129929
  • 1300–139918

Solved by topic

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

  • greedy466
  • math385
  • dp296
  • constructive algorithms270
  • implementation259
  • brute force245
  • data structures

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
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2024-10-19 16:20Codeforces Round 979 (Div. 2)19+1882118
2024-10-14 16:35Educational Codeforces Round 170 (Rated for Div. 2)768-61930
2024-10-06 08:05Codeforces Round 977 (Div. 2, based on COMPFEST 16 - Final Round)2085-981936
2024-09-29 17:35Codeforces Round 976 (Div. 2) and Divide By Zero 9.0256+432034
2024-08-25 16:35Codeforces Round 968 (Div. 2)
1400–1499
31
  • 1500–159914
  • 1600–169917
  • 1700–179939
  • 1800–1899111
  • 1900–1999150
  • 2000–209987
  • 2100–2199105
  • 2200–229994
  • 2300–239931
  • 2400–249931
  • 2500–259917
  • 2600–26995
  • 2700–27992
  • 2800–28993
  • 235
  • binary search180
  • sortings141
  • graphs125
  • dfs and similar123
  • two pointers109
  • number theory109
  • trees103
  • combinatorics101
  • bitmasks93
  • strings72
  • dsu53
  • games45
  • divide and conquer41
  • shortest paths40
  • probabilities34
  • hashing30
  • interactive24
  • geometry21
  • ternary search11
  • 2-sat8
  • graph matchings7
  • Other (8 tags)31
  • 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 33/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 35/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 48/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 3/day in 2026)

    581
    -2
    1991
    2024-08-20 16:35Codeforces Round 967 (Div. 2)312+451993
    2024-08-15 16:35Educational Codeforces Round 169 (Rated for Div. 2)591+231948
    2024-08-11 17:35EPIC Institute of Technology Round August 2024 (Div. 1 + Div. 2)740+831925
    2024-08-10 16:35Codeforces Round 965 (Div. 2)2590-681842
    2024-07-30 16:35Educational Codeforces Round 168 (Rated for Div. 2)1204-171910
    2024-07-28 17:35Pinely Round 4 (Div. 1 + Div. 2)2246-621927
    2024-07-23 16:35Codeforces Round 961 (Div. 2)274+481989