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ocharin

Open on Codeforces · Unique solved

Rating2355· International 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
43
Unique solved
1,037
Submissions (all)
2,226
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.

  • Unrated206
  • 800–899137
  • 900–99932
  • 1000–109931
  • 1100–119939
  • 1200–129947
  • 1300–139947

Solved by topic

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

  • math407
  • greedy374
  • dp234
  • implementation213
  • constructive algorithms205
  • brute force198
  • data structures

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
2026-03-28 17:15Nebius Round 2 (Codeforces Round 1088, Div. 1 + Div. 2)366-102355
2026-02-23 17:05Codeforces Round 1082 (Div. 1)65+1492365
2026-02-11 17:35Codeforces Round 1079 (Div. 1)296+192216
2026-01-29 17:35Codeforces Round 1077 (Div. 1)241+432197
2026-01-17 17:35Codeforces Round 1073 (Div. 1)
1400–1499
46
  • 1500–159928
  • 1600–169932
  • 1700–179939
  • 1800–189942
  • 1900–199950
  • 2000–209942
  • 2100–219937
  • 2200–229929
  • 2300–239932
  • 2400–249929
  • 2500–259928
  • 2600–269917
  • 2700–279917
  • 2800–289910
  • 2900–29996
  • 3000–30993
  • 3100–31996
  • 3200–32992
  • 3300–33992
  • 3500–35991
  • 188
  • combinatorics158
  • binary search133
  • sortings122
  • number theory100
  • bitmasks91
  • dfs and similar85
  • trees78
  • two pointers75
  • graphs75
  • strings53
  • dsu43
  • games36
  • divide and conquer31
  • geometry23
  • interactive22
  • probabilities17
  • shortest paths15
  • hashing14
  • ternary search12
  • graph matchings7
  • matrices7
  • Other (9 tags)23
  • 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 33/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 39/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 23/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 11/day in 2026)

    625
    -56
    2154
    2026-01-07 17:35Hello 2026283+872210
    2025-11-28 16:35Educational Codeforces Round 185 (Rated for Div. 2)35+1302123
    2025-11-23 12:35Codeforces Round 1066 (Div. 1 + Div. 2)1892-991993
    2025-11-16 16:35Codeforces Round 1064 (Div. 1)816-1072092
    2025-11-10 17:05Codeforces Round 1063 (Div. 2)25+1282199
    2025-11-06 17:35Codeforces Global Round 30 (Div. 1 + Div. 2)1048-362071
    2025-01-22 14:05Codeforces Round 1000 (Div. 2)265+192107