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Nullptrs

Open on Codeforces · Unique solved

Rating2179· 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
44
Unique solved
757
Submissions (all)
1,549
Years with activity
2024–2025

Solved by problem rating

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

  • Unrated151
  • 800–899174
  • 900–99929
  • 1000–109926
  • 1100–119928
  • 1200–129938
  • 1300–139926

Solved by topic

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

  • math260
  • greedy253
  • implementation194
  • brute force150
  • constructive algorithms137
  • dp109
  • sortings

Rating changes

2024

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2024

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2025-10-06 16:35Educational Codeforces Round 183 (Rated for Div. 2)29+1272179
2025-10-03 17:35Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2)1103-182052
2024-12-08 16:35Codeforces Round 992 (Div. 2)184+382070
2024-11-30 17:35Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2)11105-3252032
2024-11-09 17:35
1400–1499
31
  • 1500–159927
  • 1600–169921
  • 1700–179936
  • 1800–189938
  • 1900–199921
  • 2000–209924
  • 2100–219912
  • 2200–229912
  • 2300–239915
  • 2400–249914
  • 2500–25999
  • 2600–26995
  • 2700–27994
  • 2800–28991
  • 2900–29994
  • 3000–30991
  • 3100–31991
  • 3200–32991
  • 3300–33994
  • 3400–34991
  • 3500–35993
  • 91
  • data structures82
  • number theory76
  • binary search76
  • strings63
  • dfs and similar57
  • graphs46
  • combinatorics43
  • bitmasks42
  • two pointers37
  • trees31
  • geometry27
  • games24
  • dsu18
  • interactive17
  • hashing16
  • divide and conquer13
  • matrices12
  • shortest paths11
  • string suffix structures7
  • ternary search6
  • probabilities5
  • Other (9 tags)21
  • 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.

    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    LessMore (max 37/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 27/day in 2025)

    Refact.ai Match 1 (Codeforces Round 985)
    168
    +73
    2357
    2024-10-27 17:35Codeforces Global Round 27167+1142284
    2024-10-26 16:35Codeforces Round 982 (Div. 2)52+802170
    2024-10-20 11:05Codeforces Round 980 (Div. 1)880-842090
    2024-09-27 16:05Codeforces Round 975 (Div. 1)515-32174
    2024-08-30 17:05Codeforces Round 969 (Div. 1)518-152177
    2024-08-11 17:35EPIC Institute of Technology Round August 2024 (Div. 1 + Div. 2)477+412192
    2024-07-28 17:35Pinely Round 4 (Div. 1 + Div. 2)639+192151