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Top rated · Stats

KevinYao

Open on Codeforces · Unique solved

Rating2462· 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
28
Unique solved
342
Submissions (all)
902
Years with activity
2022–2025

Solved by problem rating

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

  • 800–89933
  • 900–9998
  • 1000–10999
  • 1100–11999
  • 1200–12996
  • 1300–139913
  • 1400–149910

Solved by topic

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

  • greedy132
  • math126
  • constructive algorithms95
  • dp91
  • data structures77
  • implementation61
  • combinatorics

Rating changes

2022

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2022

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2024-02-17 17:35think-cell Round 1328-332462
2024-01-06 17:05Hello 202485+1222495
2023-12-30 16:50Good Bye 20231072-882373
2023-12-23 17:35Pinely Round 3 (Div. 1 + Div. 2)238+42461
2023-11-25 17:20CodeTON Round 7 (Div. 1 + Div. 2, Rated, Prizes!)244-5
1500–1599
8
  • 1600–16996
  • 1700–179913
  • 1800–18995
  • 1900–199918
  • 2000–20996
  • 2100–219915
  • 2200–229914
  • 2300–23999
  • 2400–249920
  • 2500–259918
  • 2600–269920
  • 2700–279914
  • 2800–289915
  • 2900–299916
  • 3000–309912
  • 3100–319910
  • 3200–329914
  • 3300–33997
  • 3400–34997
  • 3500–35997
  • 54
  • graphs50
  • brute force48
  • sortings44
  • binary search41
  • number theory41
  • trees34
  • bitmasks32
  • dfs and similar30
  • probabilities23
  • divide and conquer21
  • two pointers20
  • dsu18
  • strings18
  • geometry15
  • games14
  • shortest paths13
  • interactive9
  • fft5
  • chinese remainder theorem5
  • flows5
  • hashing5
  • Other (7 tags)16
  • 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.

    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    LessMore (max 26/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 27/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 10/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 2/day in 2025)

    2457
    2023-10-08 11:35Codeforces Round 902 (Div. 1, based on COMPFEST 15 - Final Round)95+942462
    2023-09-18 16:50CodeTON Round 6 (Div. 1 + Div. 2, Rated, Prizes!)761-782368
    2023-09-10 16:35Codeforces Round 896 (Div. 1)92+962446
    2023-08-30 17:35Pinely Round 2 (Div. 1 + Div. 2)160+822350
    2023-07-29 17:05Codeforces Round 889 (Div. 1)489-412268
    2023-06-24 17:05CodeTON Round 5 (Div. 1 + Div. 2, Rated, Prizes!)247+522309
    2023-06-18 16:35Codeforces Round 880 (Div. 1)99+1742257