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Watersphere

Open on Codeforces · Unique solved

Rating2266· 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
61
Unique solved
538
Submissions (all)
1,530
Years with activity
2023–2026

Solved by problem rating

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

  • Unrated22
  • 800–89991
  • 900–99918
  • 1000–109916
  • 1100–119927
  • 1200–129931
  • 1300–139928

Solved by topic

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

  • greedy249
  • math214
  • constructive algorithms131
  • dp129
  • implementation124
  • data structures114

Rating changes

2023

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2023

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)640-572266
2026-04-13 16:35Codeforces Round 1093 (Div. 1)367-622323
2026-01-29 17:35Codeforces Round 1077 (Div. 1)188+52385
2026-01-17 17:35Codeforces Round 1073 (Div. 1)166+512380
2025-12-27 17:35Good Bye 2025868
1400–1499
26
  • 1500–159918
  • 1600–169924
  • 1700–179930
  • 1800–189928
  • 1900–199934
  • 2000–209915
  • 2100–219919
  • 2200–229912
  • 2300–239915
  • 2400–249913
  • 2500–25999
  • 2600–26999
  • 2700–27998
  • 2800–28997
  • 2900–299912
  • 3000–30994
  • 3100–31995
  • 3200–32992
  • 3300–33997
  • 3400–34993
  • 3500–35995
  • brute force
    110
  • sortings82
  • binary search81
  • graphs70
  • dfs and similar67
  • trees62
  • combinatorics51
  • number theory50
  • bitmasks48
  • two pointers46
  • strings42
  • games32
  • dsu29
  • interactive23
  • shortest paths17
  • divide and conquer15
  • probabilities12
  • geometry10
  • fft9
  • hashing8
  • ternary search7
  • *special6
  • Other (8 tags)25
  • 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 4/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 51/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 65/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 16/day in 2026)

    -64
    2329
    2025-12-19 17:05Codeforces Global Round 31 (Div. 1 + Div. 2)436-312393
    2025-11-23 12:35Codeforces Round 1066 (Div. 1 + Div. 2)399-462424
    2025-11-16 16:35Codeforces Round 1064 (Div. 1)261-382470
    2025-11-06 17:35Codeforces Global Round 30 (Div. 1 + Div. 2)309-422508
    2025-10-12 17:05Codeforces Round 1058 (Div. 1)151-12550
    2025-10-03 17:35Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2)61+1232551
    2025-09-20 17:35Codeforces Global Round 29 (Div. 1 + Div. 2)158+772428