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chinhdeptraiso1vn

Open on Codeforces · Unique solved

Rating2176· 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
64
Submissions (all)
141
Years with activity
2024–2026

Solved by problem rating

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

  • 800–89917
  • 900–9993
  • 1000–10991
  • 1100–11998
  • 1200–12993
  • 1300–13992
  • 1400–14995

Solved by topic

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

  • greedy41
  • math29
  • constructive algorithms24
  • implementation22
  • binary search17
  • brute force16

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
2026-01-07 17:35Hello 2026502+352176
2025-02-18 16:35Educational Codeforces Round 174 (Rated for Div. 2)65+902141
2025-02-16 16:35Codeforces Round 1005 (Div. 2)23+2062051
2025-02-11 16:35Codeforces Round 1004 (Div. 2)406+461845
2024-11-10 17:35Codeforces Round 986 (Div. 2)494
1500–1599
6
  • 1600–16992
  • 1700–17994
  • 1800–18992
  • 1900–19994
  • 2000–20991
  • 2100–21993
  • 2200–22991
  • 2300–23991
  • 2400–24991
  • dp
    13
  • data structures12
  • two pointers11
  • sortings6
  • number theory5
  • dfs and similar5
  • trees4
  • strings4
  • bitmasks4
  • combinatorics3
  • graphs3
  • geometry3
  • games2
  • ternary search2
  • hashing1
  • matrices1
  • graph matchings1
  • dsu1
  • divide and conquer1
  • flows1
  • 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 19/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 7/day in 2026)

    +58
    1799
    2024-11-09 17:35Refact.ai Match 1 (Codeforces Round 985)1872-151741
    2024-11-01 16:35Codeforces Round 983 (Div. 2)2798-661756
    2024-10-28 16:35Educational Codeforces Round 171 (Rated for Div. 2)1655-331822
    2024-10-27 17:35Codeforces Global Round 27660+1101855
    2024-10-26 16:35Codeforces Round 982 (Div. 2)97+2221745
    2024-09-27 16:05Codeforces Round 975 (Div. 2)155+3441523
    2024-08-20 16:35Codeforces Round 967 (Div. 2)11752+411179