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Top rated · Stats

happybobby

Open on Codeforces · Unique solved

Rating2130· 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
16
Unique solved
165
Submissions (all)
537
Years with activity
2021–2026

Solved by problem rating

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

  • 800–89926
  • 900–99910
  • 1000–10995
  • 1100–119910
  • 1200–129910
  • 1300–139911
  • 1400–14997

Solved by topic

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

  • greedy79
  • math64
  • implementation56
  • brute force42
  • dp41
  • data structures38
  • constructive algorithms

Rating changes

2021

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

Jan
Feb
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May

Submission volume

Download all years PNG

2021

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2025-11-23 12:35Codeforces Round 1066 (Div. 1 + Div. 2)2555-1752130
2025-09-24 14:50Codeforces Round 1053 (Div. 1)181+822305
2024-12-28 17:35Good Bye 2024: 2025 is NEAR400+602223
2024-08-15 16:35Educational Codeforces Round 169 (Rated for Div. 2)60+1052163
2024-08-10 16:35Codeforces Round 965 (Div. 2)
1500–1599
9
  • 1600–16995
  • 1700–17999
  • 1800–18995
  • 1900–19998
  • 2000–20998
  • 2100–21995
  • 2200–22992
  • 2300–23992
  • 2400–24994
  • 2500–25992
  • 2600–26998
  • 2700–27992
  • 2800–28996
  • 2900–29994
  • 3000–30993
  • 3100–31991
  • 3200–32992
  • 3400–34991
  • 29
  • sortings26
  • graphs22
  • binary search20
  • dfs and similar18
  • trees14
  • bitmasks13
  • combinatorics12
  • shortest paths10
  • strings9
  • games9
  • number theory9
  • dsu9
  • two pointers9
  • geometry6
  • divide and conquer6
  • fft4
  • hashing3
  • probabilities3
  • interactive3
  • string suffix structures2
  • *special2
  • Other (6 tags)6
  • 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.

    2022

    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.

    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 30/day in 2021)

    2022

    Download PNG

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

    Jan
    Feb
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    May
    Jun
    Jul
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    LessMore (max 18/day in 2022)

    2023

    Download PNG

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

    Jan
    Feb
    Mar
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    May
    Jun
    Jul
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    Sep
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    Dec

    LessMore (max 15/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
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    Dec

    LessMore (max 22/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 14/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 3/day in 2026)

    139
    +86
    2058
    2024-07-30 16:35Educational Codeforces Round 168 (Rated for Div. 2)1494-541972
    2024-07-23 16:35Codeforces Round 961 (Div. 2)426+12026
    2024-07-20 16:35Codeforces Round 960 (Div. 2)397+142025
    2024-07-15 16:35Codeforces Round 958 (Div. 2)209+662011
    2024-06-16 11:05Codeforces Round 953 (Div. 2)1239-681945
    2024-05-17 16:35Codeforces Round 945 (Div. 2)47+2402013
    2024-04-13 16:35Codeforces Round 939 (Div. 2)315+2051773