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Top rated · Stats

thu_khoa_chuyen_hoa

Open on Codeforces · Unique solved

Rating2153· 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
7
Unique solved
39
Submissions (all)
55
Years with activity
2025–2026

Solved by problem rating

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

  • 800–8997
  • 1000–10994
  • 1100–11993
  • 1200–12991
  • 1300–13995
  • 1500–15992
  • 1600–16993

Solved by topic

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

  • greedy19
  • math14
  • dp13
  • constructive algorithms8
  • data structures7
  • brute force6
  • binary search

Rating changes

2025

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2025

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2026-02-23 17:05Codeforces Round 1082 (Div. 1)124+1752153
2026-02-21 16:35Codeforces Round 1081 (Div. 2)693+211978
2026-02-11 17:35Codeforces Round 1079 (Div. 2)49+2231957
2026-02-08 11:05Codeforces Round 1078 (Div. 2)55+3461734
2026-01-29 17:35Codeforces Round 1077 (Div. 2)445
1700–1799
2
  • 1800–18992
  • 1900–19991
  • 2000–20993
  • 2100–21992
  • 2200–22991
  • 2300–23991
  • 2800–28991
  • 2900–29991
  • 5
  • graphs5
  • implementation5
  • combinatorics4
  • dfs and similar4
  • sortings4
  • bitmasks4
  • strings3
  • interactive3
  • number theory3
  • hashing2
  • schedules2
  • two pointers2
  • trees2
  • graph matchings1
  • divide and conquer1
  • games1
  • expression parsing1
  • shortest paths1
  • probabilities1
  • 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 5/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 10/day in 2026)

    +357
    1388
    2026-01-25 16:50Codeforces Round 1076 (Div. 3)1243+3801031
    2025-12-05 16:35Codeforces Round 1068 (Div. 2)590+651651