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jaewoo2009

Open on Codeforces · Unique solved

Rating2437· 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
48
Unique solved
374
Submissions (all)
784
Years with activity
2020–2026

Solved by problem rating

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

  • 800–89976
  • 900–99920
  • 1000–109924
  • 1100–119918
  • 1200–129922
  • 1300–139927
  • 1400–149917

Solved by topic

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

  • greedy197
  • math168
  • implementation107
  • constructive algorithms104
  • brute force89
  • dp80
  • data structures

Rating changes

2020

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

Jan
Feb
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Apr
May

Submission volume

Download all years PNG

2020

Download PNG

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

Jan
Feb
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Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2025-03-23 08:05Codeforces Round 1012 (Div. 1)41+1482437
2025-02-11 16:35Codeforces Round 1004 (Div. 1)113+1502289
2024-12-28 17:35Good Bye 2024: 2025 is NEAR1363-532139
2024-11-15 14:35Codeforces Round 987 (Div. 2)18+1582192
2024-10-28 16:35Educational Codeforces Round 171 (Rated for Div. 2)1024
1500–1599
25
  • 1600–169917
  • 1700–179921
  • 1800–189917
  • 1900–199921
  • 2000–209915
  • 2100–219912
  • 2200–22994
  • 2300–239914
  • 2400–249910
  • 2500–25994
  • 2600–26992
  • 2700–27993
  • 2800–28992
  • 2900–29991
  • 3000–30991
  • 3100–31991
  • 76
  • sortings68
  • binary search63
  • graphs38
  • number theory35
  • strings32
  • two pointers32
  • dfs and similar30
  • bitmasks29
  • trees28
  • combinatorics24
  • games17
  • interactive14
  • divide and conquer11
  • geometry11
  • hashing10
  • shortest paths9
  • dsu9
  • probabilities6
  • ternary search3
  • matrices2
  • graph matchings2
  • Other (5 tags)7
  • 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.

    2021

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

    Jan
    Feb
    Mar
    Apr
    May
    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.

    2022

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

    Jan
    Feb
    Mar
    Apr
    May
    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.

    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
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    Jun
    Jul
    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
    Mar
    Apr
    May
    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
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    LessMore (max 14/day in 2020)

    2021

    Download PNG

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

    Jan
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    LessMore (max 20/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 25/day in 2023)

    2024

    Download PNG

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

    Jan
    Feb
    Mar
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    May
    Jun
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    LessMore (max 23/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 18/day in 2025)

    2026

    Download PNG

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

    Jan
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    LessMore (max 2/day in 2026)

    -56
    2034
    2024-10-27 17:35Codeforces Global Round 272248-1292090
    2024-08-30 17:05Codeforces Round 969 (Div. 1)585-462219
    2024-08-11 17:35EPIC Institute of Technology Round August 2024 (Div. 1 + Div. 2)259+832265
    2024-03-16 17:00Codeforces Round 934 (Div. 1)661-482182
    2024-02-29 16:35Codeforces Round 930 (Div. 1)180+832230
    2023-10-22 13:05Codeforces Round 905 (Div. 1)378-32147
    2023-10-08 11:35Codeforces Round 902 (Div. 1, based on COMPFEST 15 - Final Round)676-572150