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Hayasa17

Open on Codeforces · Unique solved

Rating2185· 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
11
Unique solved
247
Submissions (all)
569
Years with activity
2023–2025

Solved by problem rating

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

  • Unrated42
  • 800–89944
  • 900–99911
  • 1000–10999
  • 1100–119914
  • 1200–129914
  • 1300–13999

Solved by topic

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

  • math97
  • greedy91
  • implementation57
  • brute force55
  • constructive algorithms50
  • data structures47

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
2024-03-01 16:35Codeforces Round 931 (Div. 2)15+1672185
2024-02-29 16:35Codeforces Round 930 (Div. 1)589-212018
2024-02-17 17:35think-cell Round 11914-992039
2024-01-30 16:45Codeforces Round 922 (Div. 2)47+1202138
2024-01-18 16:35Educational Codeforces Round 161 (Rated for Div. 2)536
1400–1499
11
  • 1500–15998
  • 1600–16997
  • 1700–179915
  • 1800–18993
  • 1900–199911
  • 2000–20997
  • 2100–21997
  • 2200–22999
  • 2300–23994
  • 2400–24994
  • 2500–25994
  • 2600–26995
  • 2700–27995
  • 2800–28993
  • 3000–30991
  • dp
    43
  • sortings37
  • binary search30
  • number theory26
  • two pointers24
  • dfs and similar17
  • trees15
  • bitmasks15
  • combinatorics14
  • strings14
  • graphs13
  • dsu11
  • games10
  • divide and conquer7
  • geometry5
  • interactive5
  • shortest paths5
  • matrices4
  • hashing3
  • string suffix structures3
  • ternary search1
  • probabilities1
  • Other (2 tags)2
  • 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.

    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    LessMore (max 38/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 29/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 4/day in 2025)

    -18
    2018
    2024-01-06 17:05Hello 20242630-442036
    2023-12-30 16:50Good Bye 2023139+3162080
    2023-11-19 16:35Codeforces Round 910 (Div. 2)503+1561764
    2023-11-17 16:50Codeforces Round 909 (Div. 3)6+4901608
    2023-11-07 16:35Codeforces Round 908 (Div. 2)1731+3181118
    2023-10-30 16:35Codeforces Round 907 (Div. 2)62+800800