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shigetora

Open on Codeforces · Unique solved

Rating2293· Master

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
247
Submissions (all)
526
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.

  • Unrated17
  • 800–89925
  • 900–9994
  • 1000–10992
  • 1100–119912
  • 1200–12996
  • 1300–13997

Solved by topic

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

  • math110
  • greedy91
  • data structures81
  • dp73
  • brute force50
  • constructive algorithms48
  • implementation

Rating changes

2020

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2020

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2026-04-25 17:05Spectral::Cup 2026 Round 1 (Codeforces Round 1094, Div. 1 + Div. 2)143+982293
2025-08-28 17:35Codeforces Round 1046 (Div. 1)249+722195
2025-08-07 17:35Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2)846-152123
2025-07-19 16:50Order Capital Round 1 (Codeforces Round 1038, Div. 1 + Div. 2)669+262138
2025-06-03 16:35Educational Codeforces Round 179 (Rated for Div. 2)
1400–1499
12
  • 1500–159911
  • 1600–16999
  • 1700–179917
  • 1800–189914
  • 1900–199921
  • 2000–209918
  • 2100–219914
  • 2200–229911
  • 2300–23998
  • 2400–249912
  • 2500–259911
  • 2600–26995
  • 2700–27994
  • 2800–28994
  • 2900–29993
  • 41
  • number theory39
  • dfs and similar34
  • trees34
  • binary search33
  • sortings32
  • bitmasks30
  • graphs29
  • divide and conquer25
  • combinatorics23
  • dsu15
  • two pointers15
  • strings13
  • games12
  • probabilities10
  • hashing8
  • shortest paths7
  • geometry6
  • flows5
  • interactive3
  • ternary search3
  • graph matchings3
  • Other (5 tags)8
  • 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
    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.

    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 1/day in 2020)

    2021

    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 8/day in 2021)

    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 19/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 12/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)

    20
    +175
    2112
    2025-05-31 16:35Codeforces Round 1028 (Div. 1)772-311937
    2025-05-05 16:50Codeforces Round 1023 (Div. 2)262+451968
    2024-12-02 16:35Educational Codeforces Round 172 (Rated for Div. 2)225+771923
    2024-10-28 16:35Educational Codeforces Round 171 (Rated for Div. 2)1055+501846
    2024-10-24 16:50Codeforces Round 981 (Div. 3)54+2351796
    2024-10-20 11:05Codeforces Round 980 (Div. 2)460+2271561
    2024-10-19 16:20Codeforces Round 979 (Div. 2)1787+2641334