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Zenkai

Open on Codeforces · Unique solved

Rating2122· 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
15
Unique solved
408
Submissions (all)
1,356
Years with activity
2018–2026

Solved by problem rating

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

  • 800–89918
  • 900–99910
  • 1000–109912
  • 1100–11995
  • 1200–129913
  • 1300–139910
  • 1400–14999

Solved by topic

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

  • math130
  • dp120
  • greedy114
  • implementation90
  • data structures71
  • graphs70
  • constructive algorithms

Rating changes

2018

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2018

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2019-04-13 16:05Codeforces Round 551 (Div. 2)71+672122
2019-04-06 13:35Codeforces Global Round 2642-92055
2019-03-22 17:05Educational Codeforces Round 62 (Rated for Div. 2)291-232064
2019-03-21 17:35Codeforces Round 548 (Div. 2)62+772087
2019-03-11 18:35Codeforces Round 546 (Div. 2)162
1500–1599
22
  • 1600–169925
  • 1700–179932
  • 1800–189931
  • 1900–199955
  • 2000–209951
  • 2100–219932
  • 2200–229929
  • 2300–239915
  • 2400–249928
  • 2500–25997
  • 2600–26992
  • 2700–27991
  • 2800–28991
  • 60
  • dfs and similar60
  • brute force53
  • binary search52
  • number theory46
  • trees42
  • sortings40
  • strings36
  • combinatorics31
  • bitmasks30
  • flows22
  • dsu21
  • two pointers16
  • shortest paths15
  • geometry13
  • games12
  • probabilities11
  • divide and conquer9
  • interactive9
  • hashing7
  • string suffix structures7
  • matrices7
  • Other (8 tags)30
  • Jun
    Jul
    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.

    2019

    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.

    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
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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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    Apr
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    Jun
    Jul
    Aug
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    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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    Dec

    LessMore (max 12/day in 2018)

    2019

    Download PNG

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

    Jan
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    LessMore (max 52/day in 2019)

    2022

    Download PNG

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

    Jan
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    LessMore (max 9/day in 2022)

    2023

    Download PNG

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

    Jan
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    LessMore (max 8/day in 2023)

    2024

    Download PNG

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

    Jan
    Feb
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    May
    Jun
    Jul
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    Sep
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    LessMore (max 3/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
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    Dec

    LessMore (max 16/day in 2025)

    2026

    Download PNG

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

    Jan
    Feb
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    Jun
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    LessMore (max 3/day in 2026)

    +27
    2010
    2019-03-05 17:20Educational Codeforces Round 61 (Rated for Div. 2)290-11983
    2019-02-18 17:40Educational Codeforces Round 60 (Rated for Div. 2)247+311984
    2019-02-16 19:05Codeforces Round 539 (Div. 2)69+881953
    2019-02-10 16:05Codeforces Round 538 (Div. 2)1580-721865
    2019-02-07 15:35Codeforces Global Round 1743+361937
    2019-02-03 17:35CodeCraft-19 and Codeforces Round 537 (Div. 2)147+1041901
    2019-01-22 16:35Codeforces Round 534 (Div. 2)528+121797