CF Elite Tracker
TopExploreDivisionsLearnPracticeUser solvedHelp
HelpLog inSign up

Top rated · Stats

xujindong

Open on Codeforces · Unique solved

Rating2142· 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
32
Unique solved
692
Submissions (all)
1,788
Years with activity
2022–2026

Solved by problem rating

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

  • Unrated23
  • 800–89965
  • 900–99918
  • 1000–109919
  • 1100–119916
  • 1200–129916
  • 1300–139919

Solved by topic

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

  • math272
  • greedy203
  • dp174
  • data structures166
  • brute force121
  • constructive algorithms118
  • number theory

Rating changes

2022

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2022

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2025-09-20 17:35Codeforces Global Round 29 (Div. 1 + Div. 2)815-72142
2025-09-09 16:35Codeforces Round 1049 (Div. 2)32+1412149
2025-08-26 16:35Codeforces Round 1045 (Div. 2)124+1092008
2025-08-24 16:35Codeforces Round 1044 (Div. 2)1487-451899
2025-08-07 17:35Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2)
1400–1499
21
  • 1500–159920
  • 1600–169915
  • 1700–179913
  • 1800–189924
  • 1900–199919
  • 2000–209934
  • 2100–219931
  • 2200–229941
  • 2300–239936
  • 2400–249933
  • 2500–259933
  • 2600–269930
  • 2700–279927
  • 2800–289927
  • 2900–299931
  • 3000–309916
  • 3100–319913
  • 3200–329922
  • 3300–339912
  • 3400–34996
  • 3500–359912
  • 115
  • implementation115
  • bitmasks96
  • binary search84
  • trees83
  • combinatorics81
  • graphs76
  • dfs and similar75
  • sortings67
  • divide and conquer51
  • two pointers44
  • interactive37
  • games36
  • strings28
  • dsu27
  • flows24
  • probabilities20
  • fft18
  • matrices16
  • shortest paths16
  • geometry14
  • hashing12
  • Other (7 tags)30
  • 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.

    2023

    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.

    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 13/day in 2022)

    2023

    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 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 22/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 25/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 11/day in 2026)

    924
    +36
    1944
    2025-07-31 17:35Codeforces Round 1040 (Div. 1)879-651908
    2025-07-22 16:35Educational Codeforces Round 181 (Rated for Div. 2)153+1011973
    2025-07-19 16:50Order Capital Round 1 (Codeforces Round 1038, Div. 1 + Div. 2)1251+401872
    2024-12-03 08:25Codeforces Round 990 (Div. 1)699-681832
    2024-07-20 16:35Codeforces Round 960 (Div. 2)589+281900
    2024-07-15 16:35Codeforces Round 958 (Div. 2)676+281872
    2024-04-30 17:05Codeforces Round 942 (Div. 2)267+681844