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HuaXinCai

Open on Codeforces · Unique solved

Rating2120· 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
18
Unique solved
139
Submissions (all)
278
Years with activity
2024–2025

Solved by problem rating

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

  • Unrated23
  • 800–89925
  • 900–9996
  • 1000–10996
  • 1100–11996
  • 1200–12997
  • 1300–13997

Solved by topic

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

  • math63
  • greedy51
  • implementation35
  • brute force34
  • constructive algorithms34
  • binary search31

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
2024-12-08 16:35Codeforces Round 992 (Div. 2)44+1172120
2024-11-23 17:35CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)773+442003
2024-11-10 17:35Codeforces Round 986 (Div. 2)609-171959
2024-11-01 16:35Codeforces Round 983 (Div. 2)633-71976
2024-10-28 16:35Educational Codeforces Round 171 (Rated for Div. 2)
1400–1499
6
  • 1500–15998
  • 1600–16997
  • 1700–17999
  • 1800–18997
  • 1900–19999
  • 2000–20993
  • 2100–21993
  • 2200–22992
  • 2300–23992
  • 2500–25991
  • 2700–27992
  • number theory
    24
  • dp22
  • data structures17
  • sortings14
  • combinatorics11
  • two pointers11
  • bitmasks9
  • strings9
  • dfs and similar8
  • graphs8
  • trees7
  • games5
  • interactive5
  • hashing4
  • geometry3
  • dsu3
  • ternary search3
  • probabilities2
  • shortest paths2
  • divide and conquer2
  • matrices1
  • chinese remainder theorem1
  • Other (2 tags)2
  • 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.

    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    LessMore (max 28/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 11/day in 2025)

    117
    +122
    1983
    2024-10-27 17:35Codeforces Global Round 274036-1441861
    2024-10-20 11:05Codeforces Round 980 (Div. 1)626+82005
    2024-10-19 16:20Codeforces Round 979 (Div. 2)649-221997
    2024-10-14 16:35Educational Codeforces Round 170 (Rated for Div. 2)310+312019
    2024-09-29 17:35Codeforces Round 976 (Div. 2) and Divide By Zero 9.0188+861988
    2024-09-27 16:05Codeforces Round 975 (Div. 2)335+401902
    2024-09-20 16:35Codeforces Round 973 (Div. 2)897+21862