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Top rated · Stats

lijinyu2022

Open on Codeforces · Unique solved

Rating2135· 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
169
Submissions (all)
400
Years with activity
2023–2026

Solved by problem rating

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

  • Unrated2
  • 800–89922
  • 900–99910
  • 1000–10996
  • 1100–11996
  • 1200–129913
  • 1300–13995

Solved by topic

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

  • greedy85
  • math65
  • constructive algorithms47
  • data structures44
  • dp44
  • brute force36
  • implementation

Rating changes

2023

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2023

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2025-03-22 16:35Codeforces Round 1011 (Div. 2)107+602135
2025-03-10 17:15Codeforces Round 1008 (Div. 1)506+42075
2025-01-22 14:05Codeforces Round 1000 (Div. 2)85+1132071
2025-01-04 17:05Hello 20252043-481958
2024-12-28 17:35Good Bye 2024: 2025 is NEAR696+76
1400–1499
7
  • 1500–15995
  • 1600–16996
  • 1700–179911
  • 1800–18996
  • 1900–19998
  • 2000–20994
  • 2100–21994
  • 2200–22991
  • 2300–23995
  • 2400–24993
  • 2500–25999
  • 2600–26997
  • 2700–27994
  • 2800–28997
  • 2900–29993
  • 3000–30995
  • 3100–31991
  • 3200–32994
  • 3300–33992
  • 3400–34991
  • 3500–35992
  • 36
  • sortings25
  • trees22
  • binary search22
  • dfs and similar19
  • number theory18
  • graphs17
  • two pointers17
  • strings15
  • combinatorics13
  • games12
  • bitmasks12
  • divide and conquer11
  • interactive9
  • hashing9
  • probabilities8
  • dsu7
  • geometry5
  • flows4
  • string suffix structures3
  • shortest paths3
  • fft2
  • Other (5 tags)6
  • 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 4/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 16/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 9/day in 2026)

    2006
    2024-12-02 16:35Educational Codeforces Round 172 (Rated for Div. 2)785-241930
    2024-09-14 16:35Codeforces Round 972 (Div. 2)119+1421954
    2024-08-30 17:05Codeforces Round 969 (Div. 2)534+401812
    2024-07-23 16:35Codeforces Round 961 (Div. 2)2895-751772
    2024-07-20 16:35Codeforces Round 960 (Div. 2)768+261847
    2024-07-18 16:35Codeforces Round 959 sponsored by NEAR (Div. 1 + Div. 2)3842-511821
    2024-07-15 16:35Codeforces Round 958 (Div. 2)116+2481872