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Zhou_Hang

Open on Codeforces · Unique solved

Rating2432· 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
14
Unique solved
132
Submissions (all)
203
Years with activity
2025–2026

Solved by problem rating

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

  • Unrated18
  • 800–89922
  • 900–9994
  • 1000–10996
  • 1100–11998
  • 1200–12995
  • 1300–13998

Solved by topic

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

  • greedy70
  • math54
  • constructive algorithms37
  • dp32
  • data structures27
  • brute force21
  • sortings

Rating changes

2025

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2025

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2026-04-13 16:35Codeforces Round 1093 (Div. 1)61+1212432
2026-03-08 17:35Codeforces Round 1085 (Div. 1 + Div. 2)103+1032311
2026-02-23 17:05Codeforces Round 1082 (Div. 1)111+1592208
2026-01-29 17:35Codeforces Round 1077 (Div. 2)15+1952049
2025-10-30 19:35Pinely Round 5 (Div. 1 + Div. 2)1960
1400–1499
8
  • 1500–15993
  • 1600–16996
  • 1700–17996
  • 1800–18995
  • 1900–19993
  • 2000–20993
  • 2100–21993
  • 2200–22998
  • 2300–23991
  • 2400–24994
  • 2500–25991
  • 2600–26992
  • 2700–27993
  • 2800–28991
  • 2900–29991
  • 3000–30991
  • 3300–33992
  • 20
  • binary search16
  • trees15
  • implementation14
  • combinatorics14
  • number theory13
  • two pointers13
  • games12
  • bitmasks11
  • graphs11
  • dsu10
  • dfs and similar9
  • divide and conquer8
  • interactive6
  • strings5
  • probabilities3
  • hashing2
  • string suffix structures2
  • matrices2
  • shortest paths2
  • fft2
  • geometry2
  • Other (4 tags)4
  • 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 16/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 7/day in 2026)

    -86
    1854
    2025-10-24 16:35Codeforces Round 1061 (Div. 2)1669-791940
    2025-08-07 17:35Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2)1386-392019
    2025-07-31 17:35Codeforces Round 1040 (Div. 1)804-712058
    2025-07-27 16:35Codeforces Round 1039 (Div. 2)87+1272129
    2025-07-22 16:35Educational Codeforces Round 181 (Rated for Div. 2)226+1402002
    2025-07-19 16:50Order Capital Round 1 (Codeforces Round 1038, Div. 1 + Div. 2)185+3741862
    2025-07-17 16:50Codeforces Round 1037 (Div. 3)269+2991488