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zhenghanyun2

Open on Codeforces · Unique solved

Rating2597· Grandmaster

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
20
Unique solved
472
Submissions (all)
1,399
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.

  • Unrated18
  • 800–89933
  • 900–9995
  • 1000–10997
  • 1100–119913
  • 1200–129912
  • 1300–139910

Solved by topic

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

  • math219
  • dp192
  • greedy169
  • data structures117
  • constructive algorithms109
  • combinatorics106
  • brute force

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
2026-04-25 17:05Spectral::Cup 2026 Round 1 (Codeforces Round 1094, Div. 1 + Div. 2)75+542597
2026-04-13 16:35Codeforces Round 1093 (Div. 1)59+822543
2025-07-19 16:50Order Capital Round 1 (Codeforces Round 1038, Div. 1 + Div. 2)461-412461
2025-05-31 16:35Codeforces Round 1028 (Div. 1)594-1352502
2025-04-19 16:35Neowise Labs Contest 1 (Codeforces Round 1018, Div. 1 + Div. 2)
1400–1499
10
  • 1500–15998
  • 1600–16997
  • 1700–179912
  • 1800–189912
  • 1900–19998
  • 2000–20997
  • 2100–21999
  • 2200–229917
  • 2300–239923
  • 2400–249960
  • 2500–259949
  • 2600–269960
  • 2700–279931
  • 2800–289931
  • 2900–299912
  • 3000–30995
  • 3100–31994
  • 3200–32992
  • 3400–34992
  • 3500–35995
  • 100
  • implementation81
  • bitmasks71
  • graphs64
  • number theory63
  • binary search62
  • dfs and similar62
  • trees61
  • sortings52
  • divide and conquer41
  • two pointers28
  • dsu27
  • probabilities23
  • games23
  • strings21
  • interactive20
  • fft18
  • matrices18
  • hashing13
  • shortest paths11
  • string suffix structures7
  • flows5
  • Other (7 tags)18
  • 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 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 30/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 23/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 81/day in 2026)

    91
    +61
    2637
    2025-04-05 17:35Teza Round 1 (Codeforces Round 1015, Div. 1 + Div. 2)93+682576
    2025-03-23 08:05Codeforces Round 1012 (Div. 1)171-362508
    2025-03-10 17:15Codeforces Round 1008 (Div. 1)85+732544
    2025-02-11 16:35Codeforces Round 1004 (Div. 1)213-22471
    2025-01-26 17:05Ethflow Round 1 (Codeforces Round 1001, Div. 1 + Div. 2)58+1762473
    2024-12-28 17:35Good Bye 2024: 2025 is NEAR231+972297
    2024-12-03 08:25Codeforces Round 990 (Div. 1)245+412200