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Top rated · Stats

liaoz123

Open on Codeforces · Unique solved

Rating2303· 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
53
Unique solved
1,177
Submissions (all)
2,563
Years with activity
2022–2026

Solved by problem rating

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

  • Unrated72
  • 800–899122
  • 900–99924
  • 1000–109929
  • 1100–119934
  • 1200–129935
  • 1300–139934

Solved by topic

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

  • greedy441
  • math411
  • dp366
  • data structures297
  • constructive algorithms236
  • brute force218
  • implementation

Rating changes

2022

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

2022

Download PNG

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

Jan
Feb
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Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2026-04-25 17:05Spectral::Cup 2026 Round 1 (Codeforces Round 1094, Div. 1 + Div. 2)147+922303
2026-03-28 17:15Nebius Round 2 (Codeforces Round 1088, Div. 1 + Div. 2)117+1572211
2026-03-14 16:35Codeforces Round 1086 (Div. 2)575-272054
2026-01-07 17:35Hello 20261212-332081
2025-12-27 17:35Good Bye 2025
1400–1499
36
  • 1500–159919
  • 1600–169931
  • 1700–179934
  • 1800–189941
  • 1900–199953
  • 2000–209938
  • 2100–219951
  • 2200–229953
  • 2300–239957
  • 2400–249963
  • 2500–259965
  • 2600–269974
  • 2700–279960
  • 2800–289941
  • 2900–299934
  • 3000–309927
  • 3100–319912
  • 3200–329914
  • 3300–339910
  • 3400–34997
  • 3500–35997
  • 209
  • trees180
  • graphs171
  • dfs and similar168
  • binary search153
  • combinatorics131
  • bitmasks126
  • sortings120
  • number theory114
  • two pointers85
  • divide and conquer82
  • strings79
  • dsu70
  • games52
  • probabilities48
  • hashing42
  • shortest paths41
  • interactive37
  • string suffix structures22
  • matrices21
  • geometry19
  • fft15
  • Other (8 tags)55
  • 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
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    LessMore (max 8/day in 2022)

    2023

    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 19/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 41/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 26/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 16/day in 2026)

    546
    +58
    2114
    2025-12-19 17:05Codeforces Global Round 31 (Div. 1 + Div. 2)185+1842056
    2025-12-06 10:15Codeforces Round 1069 (Div. 1)663-651872
    2025-11-23 12:35Codeforces Round 1066 (Div. 1 + Div. 2)1589-591937
    2025-11-14 16:35Educational Codeforces Round 184 (Rated for Div. 2)58+1691996
    2025-11-06 17:35Codeforces Global Round 30 (Div. 1 + Div. 2)12040-2761827
    2025-10-12 17:05Codeforces Round 1058 (Div. 1)232+1272103
    2025-10-06 16:35Educational Codeforces Round 183 (Rated for Div. 2)207+761976