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hungcubuso1vn

Open on Codeforces · Unique solved

Rating2189· 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
90
Unique solved
515
Submissions (all)
1,071
Years with activity
2023–2026

Solved by problem rating

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

  • Unrated13
  • 800–89977
  • 900–99914
  • 1000–109912
  • 1100–119927
  • 1200–129927
  • 1300–139927

Solved by topic

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

  • greedy232
  • math197
  • constructive algorithms161
  • dp138
  • implementation128
  • data structures105

Rating changes

2023

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

Jan
Feb
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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
2026-03-28 17:15Nebius Round 2 (Codeforces Round 1088, Div. 1 + Div. 2)862-462189
2026-02-26 17:05Codeforces Round 1083 (Div. 2)52+592235
2026-02-25 16:35Educational Codeforces Round 187 (Rated for Div. 2)45+1042176
2026-02-23 17:05Codeforces Round 1082 (Div. 1)664-682072
2026-02-21 16:35Codeforces Round 1081 (Div. 2)
1400–1499
22
  • 1500–159912
  • 1600–169913
  • 1700–179921
  • 1800–189921
  • 1900–199951
  • 2000–209936
  • 2100–219929
  • 2200–229944
  • 2300–239925
  • 2400–249923
  • 2500–259913
  • 2600–26992
  • 2700–27994
  • 3100–31991
  • 3400–34991
  • brute force
    102
  • binary search79
  • bitmasks62
  • sortings56
  • dfs and similar53
  • graphs50
  • strings49
  • number theory48
  • trees47
  • combinatorics47
  • two pointers44
  • games31
  • divide and conquer30
  • dsu29
  • shortest paths20
  • geometry19
  • interactive18
  • ternary search14
  • probabilities13
  • fft10
  • matrices10
  • hashing9
  • Other (8 tags)19
  • 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 14/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 17/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)

    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 23/day in 2026)

    37
    +119
    2140
    2026-02-11 17:35Codeforces Round 1079 (Div. 1)509+02021
    2026-01-17 17:35Codeforces Round 1073 (Div. 1)879-962021
    2025-12-27 17:35Good Bye 2025380+982117
    2025-12-19 17:05Codeforces Global Round 31 (Div. 1 + Div. 2)1805-722019
    2025-11-29 16:35Codeforces Round 1067 (Div. 2)132+502091
    2025-10-10 16:50Codeforces Round 1057 (Div. 2)64+1352041
    2025-10-03 17:35Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2)2879-891906