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xxh1999

Open on Codeforces · Unique solved

Rating2311· 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
59
Unique solved
1,280
Submissions (all)
2,311
Years with activity
2022–2026

Solved by problem rating

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

  • Unrated198
  • 800–899227
  • 900–99949
  • 1000–109947
  • 1100–119965
  • 1200–129951
  • 1300–139957

Solved by topic

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

  • greedy573
  • math454
  • constructive algorithms384
  • implementation335
  • brute force276
  • dp223
  • sortings

Rating changes

2022

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2022

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2025-11-06 17:35Codeforces Global Round 30 (Div. 1 + Div. 2)395-22311
2025-07-19 16:50Order Capital Round 1 (Codeforces Round 1038, Div. 1 + Div. 2)682-352313
2025-01-26 17:05Ethflow Round 1 (Codeforces Round 1001, Div. 1 + Div. 2)154+1232348
2025-01-04 17:05Hello 20251678-1062225
2024-12-19 17:35Codeforces Global Round 28
1400–1499
52
  • 1500–159948
  • 1600–169965
  • 1700–179956
  • 1800–189951
  • 1900–199955
  • 2000–209997
  • 2100–219932
  • 2200–229940
  • 2300–239924
  • 2400–249925
  • 2500–259914
  • 2600–26998
  • 2700–27994
  • 2800–28994
  • 2900–29991
  • 3000–30992
  • 3100–31993
  • 3200–32991
  • 3300–33991
  • 3500–35993
  • 170
  • data structures163
  • binary search151
  • number theory119
  • graphs108
  • bitmasks100
  • strings98
  • dfs and similar95
  • two pointers92
  • combinatorics82
  • trees77
  • games49
  • dsu41
  • interactive37
  • *special29
  • divide and conquer29
  • shortest paths26
  • geometry26
  • hashing25
  • probabilities17
  • ternary search9
  • matrices8
  • Other (10 tags)38
  • 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
    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 21/day in 2022)

    2023

    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 40/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 33/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 30/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 21/day in 2026)

    351
    +16
    2331
    2024-11-30 17:35Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2)704-532315
    2024-11-23 17:35CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)350+102368
    2024-11-09 17:35Refact.ai Match 1 (Codeforces Round 985)156+812358
    2024-07-18 16:35Codeforces Round 959 sponsored by NEAR (Div. 1 + Div. 2)438+42277
    2024-06-30 17:35EPIC Institute of Technology Round Summer 2024 (Div. 1 + Div. 2)591-322273
    2024-05-25 17:35Codeforces Round 947 (Div. 1 + Div. 2)728-722305
    2024-04-30 17:05Codeforces Round 942 (Div. 1)134+992377