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ZhouYuHang

Open on Codeforces · Unique solved

Rating2531· 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
17
Unique solved
238
Submissions (all)
542
Years with activity
2021–2026

Solved by problem rating

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

  • Unrated4
  • 800–89927
  • 900–9998
  • 1000–10994
  • 1100–11996
  • 1200–12995
  • 1300–13999

Solved by topic

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

  • math87
  • greedy75
  • dp65
  • data structures60
  • implementation44
  • graphs41
  • constructive algorithms

Rating changes

2021

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

Jan
Feb
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May

Submission volume

Download all years PNG

2021

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2025-12-06 10:15Codeforces Round 1069 (Div. 1)36+1182531
2025-11-23 12:35Codeforces Round 1066 (Div. 1 + Div. 2)207+262413
2025-04-26 11:35Codeforces Round 1021 (Div. 1)127+472387
2025-03-23 08:05Codeforces Round 1012 (Div. 1)107+762340
2025-01-26 17:05Ethflow Round 1 (Codeforces Round 1001, Div. 1 + Div. 2)
1400–1499
8
  • 1500–15998
  • 1600–16995
  • 1700–17999
  • 1800–18995
  • 1900–199912
  • 2000–20998
  • 2100–219914
  • 2200–22995
  • 2300–239921
  • 2400–249916
  • 2500–259916
  • 2600–269911
  • 2700–27997
  • 2800–289910
  • 2900–29994
  • 3000–30994
  • 3100–31992
  • 3200–32992
  • 3300–33992
  • 3400–34992
  • 3500–35994
  • 36
  • brute force34
  • dfs and similar32
  • combinatorics31
  • sortings31
  • trees27
  • number theory25
  • binary search22
  • bitmasks22
  • two pointers19
  • strings18
  • probabilities15
  • shortest paths11
  • divide and conquer10
  • dsu9
  • flows7
  • games7
  • hashing7
  • matrices6
  • fft4
  • geometry3
  • interactive3
  • Other (5 tags)8
  • Jun
    Jul
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    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.

    2022

    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.

    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
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    Apr
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    Jun
    Jul
    Aug
    Sep
    Oct
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    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
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    Dec

    LessMore (max 8/day in 2021)

    2022

    Download PNG

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

    Jan
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    LessMore (max 17/day in 2022)

    2023

    Download PNG

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

    Jan
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    Jun
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    LessMore (max 16/day in 2023)

    2024

    Download PNG

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

    Jan
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    May
    Jun
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    Dec

    LessMore (max 11/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 11/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)

    334
    +67
    2264
    2024-10-20 11:05Codeforces Round 980 (Div. 1)276+672197
    2024-01-06 17:05Hello 2024879+52130
    2023-11-07 16:35Codeforces Round 908 (Div. 1)484-32125
    2023-10-08 11:35Codeforces Round 902 (Div. 1, based on COMPFEST 15 - Final Round)564-182128
    2023-08-30 17:35Pinely Round 2 (Div. 1 + Div. 2)713-92146
    2023-04-29 16:50Codeforces Round 869 (Div. 1)146+1622155
    2023-04-15 11:05Codeforces Round 866 (Div. 2)95+971993