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Top rated · Stats

ywwuyi

Open on Codeforces · Unique solved

Rating2806· International 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
18
Unique solved
341
Submissions (all)
715
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.

  • Unrated72
  • 800–89940
  • 900–9997
  • 1000–109911
  • 1100–119914
  • 1200–12998
  • 1300–139912

Solved by topic

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

  • greedy131
  • math115
  • dp75
  • implementation64
  • data structures58
  • constructive algorithms58
  • brute force

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
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Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2026-01-17 17:35Codeforces Round 1073 (Div. 1)16+1462806
2026-01-07 17:35Hello 202639+1252660
2025-12-27 17:35Good Bye 2025112+752535
2025-12-19 17:05Codeforces Global Round 31 (Div. 1 + Div. 2)238+102460
2025-11-16 16:35Codeforces Round 1064 (Div. 1)576-128
1400–1499
10
  • 1500–159912
  • 1600–16998
  • 1700–179910
  • 1800–189917
  • 1900–199911
  • 2000–209918
  • 2100–21999
  • 2200–229914
  • 2300–239916
  • 2400–24999
  • 2500–25998
  • 2600–26999
  • 2700–27997
  • 2800–28999
  • 2900–29992
  • 3000–30992
  • 3100–31991
  • 3200–32992
  • 3300–33991
  • 3500–35992
  • 47
  • binary search38
  • sortings38
  • number theory37
  • dfs and similar32
  • graphs32
  • combinatorics32
  • trees31
  • bitmasks27
  • two pointers24
  • strings21
  • games15
  • dsu11
  • divide and conquer9
  • interactive8
  • hashing7
  • probabilities7
  • shortest paths4
  • graph matchings4
  • matrices4
  • geometry4
  • string suffix structures3
  • Other (7 tags)10
  • 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
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    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.

    2024

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

    Jan
    Feb
    Mar
    Apr
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    Jun
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    Aug
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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.

    2025

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

    Jan
    Feb
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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
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    Aug
    Sep
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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.

    May
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    LessMore (max 14/day in 2021)

    2022

    Download PNG

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

    Jan
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    LessMore (max 13/day in 2022)

    2023

    Download PNG

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

    Jan
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    LessMore (max 23/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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    LessMore (max 27/day in 2024)

    2025

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
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    Dec

    LessMore (max 15/day in 2025)

    2026

    Download PNG

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

    Jan
    Feb
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    May
    Jun
    Jul
    Aug
    Sep
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    Dec

    LessMore (max 21/day in 2026)

    2450
    2025-11-06 17:35Codeforces Global Round 30 (Div. 1 + Div. 2)160+22578
    2025-10-03 17:35Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2)114+492576
    2025-04-05 17:35Teza Round 1 (Codeforces Round 1015, Div. 1 + Div. 2)135+462527
    2025-03-23 08:05Codeforces Round 1012 (Div. 1)126+62481
    2024-08-11 17:35EPIC Institute of Technology Round August 2024 (Div. 1 + Div. 2)124+832475
    2024-04-27 16:35Codeforces Round 941 (Div. 1)174+582392
    2023-12-30 16:50Good Bye 2023104+1612334