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Top rated · Stats

YannLiu

Open on Codeforces · Unique solved

Rating2123· 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
26
Unique solved
116
Submissions (all)
311
Years with activity
2020–2021

Solved by problem rating

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

  • 800–89923
  • 900–9998
  • 1000–10999
  • 1100–11995
  • 1200–12994
  • 1300–13997
  • 1400–14997

Solved by topic

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

  • greedy62
  • math57
  • constructive algorithms38
  • implementation27
  • sortings26
  • dp24
  • data structures

Rating changes

2020

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

Jan
Feb
Mar
Apr
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
2021-01-29 16:35Educational Codeforces Round 103 (Rated for Div. 2)159+522123
2021-01-19 16:35Codeforces Round 696 (Div. 2)212+412071
2021-01-14 16:35Educational Codeforces Round 102 (Rated for Div. 2)165+672030
2021-01-08 16:35Codeforces Round 695 (Div. 2)326+601963
2021-01-05 16:35Codeforces Round 694 (Div. 1)
1500–1599
8
  • 1600–16996
  • 1700–179911
  • 1800–18998
  • 1900–19999
  • 2000–20993
  • 2100–21992
  • 2200–22992
  • 2300–23992
  • 2400–24992
  • 18
  • brute force18
  • binary search15
  • graphs10
  • number theory9
  • two pointers9
  • bitmasks8
  • strings8
  • dfs and similar6
  • trees5
  • combinatorics5
  • hashing4
  • dsu4
  • geometry3
  • probabilities2
  • games2
  • flows2
  • string suffix structures1
  • divide and conquer1
  • interactive1
  • 2-sat1
  • chinese remainder theorem1
  • Other (4 tags)4
  • 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.

    2021

    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 20/day in 2020)

    2021

    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 13/day in 2021)

    827
    -36
    1903
    2020-12-30 17:35Good Bye 2020794+891939
    2020-12-28 16:35Educational Codeforces Round 101 (Rated for Div. 2)841+131850
    2020-12-20 17:05Codeforces Round 692 (Div. 1, based on Technocup 2021 Elimination Round 3)762-641837
    2020-12-17 16:35Educational Codeforces Round 100 (Rated for Div. 2)1303-421901
    2020-12-11 16:35Codeforces Round 689 (Div. 2, based on Zed Code Competition)414+191943
    2020-12-06 17:35Codeforces Global Round 12969+291924
    2020-12-04 15:20Codeforces Round 688 (Div. 2)468+281895