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LittleXi

Open on Codeforces · Unique solved

Rating2309· 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
87
Unique solved
1,085
Submissions (all)
2,575
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.

  • Unrated230
  • 800–899194
  • 900–99942
  • 1000–109945
  • 1100–119965
  • 1200–129955
  • 1300–139951

Solved by topic

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

  • greedy443
  • math393
  • constructive algorithms234
  • implementation234
  • brute force216
  • dp157
  • data structures

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
2025-04-26 11:35Codeforces Round 1021 (Div. 1)144+612309
2025-04-19 16:35Neowise Labs Contest 1 (Codeforces Round 1018, Div. 1 + Div. 2)316+622248
2025-04-05 17:35Teza Round 1 (Codeforces Round 1015, Div. 1 + Div. 2)233+1092186
2025-04-03 16:35Educational Codeforces Round 177 (Rated for Div. 2)328+22077
2025-03-29 16:35Codeforces Round 1014 (Div. 2)
1400–1499
52
  • 1500–159941
  • 1600–169938
  • 1700–179948
  • 1800–189945
  • 1900–199945
  • 2000–209929
  • 2100–219917
  • 2200–229933
  • 2300–239918
  • 2400–249922
  • 2500–25995
  • 2600–26997
  • 2700–27991
  • 2900–29991
  • 3100–31991
  • 149
  • sortings143
  • binary search126
  • number theory99
  • strings81
  • bitmasks68
  • two pointers68
  • graphs66
  • dfs and similar64
  • combinatorics57
  • trees52
  • games36
  • dsu32
  • interactive21
  • divide and conquer18
  • shortest paths17
  • geometry17
  • hashing16
  • probabilities8
  • ternary search5
  • 2-sat3
  • flows3
  • Other (5 tags)11
  • 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 19/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 57/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 13/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 4/day in 2026)

    687
    -35
    2075
    2025-03-23 08:05Codeforces Round 1012 (Div. 1)295+322110
    2025-03-17 16:35Educational Codeforces Round 176 (Rated for Div. 2)106+892078
    2025-01-04 17:05Hello 20251882-471989
    2024-12-03 08:25Codeforces Round 990 (Div. 2)103+252036
    2024-12-02 16:35Educational Codeforces Round 172 (Rated for Div. 2)90+1142011
    2024-11-30 17:35Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2)6711-2281897
    2024-04-13 16:35Codeforces Round 939 (Div. 2)135+512125