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Top rated · Stats

nhuhieu193

Open on Codeforces · Unique solved

Rating2157· 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
53
Unique solved
330
Submissions (all)
788
Years with activity
2020–2026

Solved by problem rating

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

  • Unrated1
  • 800–89975
  • 900–99926
  • 1000–109918
  • 1100–119923
  • 1200–129922
  • 1300–139925

Solved by topic

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

  • greedy152
  • math123
  • implementation99
  • constructive algorithms86
  • brute force64
  • dp63
  • sortings

Rating changes

2020

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

2020

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2023-02-16 16:35Educational Codeforces Round 143 (Rated for Div. 2)6+2282157
2023-02-09 16:35Codeforces Round 851 (Div. 2)797-271929
2023-02-01 16:35Codeforces Round 848 (Div. 2)426+51956
2023-01-05 16:35Codeforces Round 842 (Div. 2)447+161951
2023-01-03 17:05Hello 20231039
1400–1499
23
  • 1500–159913
  • 1600–169914
  • 1700–179916
  • 1800–189913
  • 1900–199914
  • 2000–209912
  • 2100–21998
  • 2200–22997
  • 2300–23998
  • 2400–24993
  • 2500–25994
  • 2600–26992
  • 2700–27991
  • 2800–28991
  • 2900–29991
  • 54
  • data structures45
  • number theory42
  • binary search37
  • graphs33
  • dfs and similar27
  • combinatorics27
  • two pointers24
  • strings23
  • bitmasks15
  • trees14
  • dsu13
  • shortest paths12
  • games10
  • hashing6
  • probabilities5
  • geometry5
  • flows4
  • divide and conquer4
  • chinese remainder theorem2
  • string suffix structures2
  • graph matchings2
  • Other (6 tags)6
  • Jun
    Jul
    Aug
    Sep
    Oct
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    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.

    2021

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

    Jan
    Feb
    Mar
    Apr
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    Jun
    Jul
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    Sep
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    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
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    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
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    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
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    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
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    Jun
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    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
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    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
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    LessMore (max 14/day in 2020)

    2021

    Download PNG

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

    Jan
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    LessMore (max 36/day in 2021)

    2022

    Download PNG

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

    Jan
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    LessMore (max 17/day in 2022)

    2023

    Download PNG

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

    Jan
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    LessMore (max 9/day in 2023)

    2024

    Download PNG

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

    Jan
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    LessMore (max 10/day in 2024)

    2025

    Download PNG

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

    Jan
    Feb
    Mar
    Apr
    May
    Jun
    Jul
    Aug
    Sep
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    Dec

    LessMore (max 7/day in 2025)

    2026

    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 3/day in 2026)

    +30
    1935
    2022-12-30 17:05Good Bye 2022: 2023 is NEAR2406-481905
    2022-12-16 16:35Educational Codeforces Round 140 (Rated for Div. 2)209+711953
    2022-12-15 17:05Codeforces Round 838 (Div. 2)389+401882
    2022-12-12 16:35Educational Codeforces Round 139 (Rated for Div. 2)118+1501842
    2022-12-11 17:35Codeforces Round 837 (Div. 2)997+251692
    2022-11-26 16:35Codeforces Global Round 242293-501667
    2022-11-25 17:35Codeforces Round 836 (Div. 2)1302-161717