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FangYifan

Open on Codeforces · Unique solved

Rating2116· 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
63
Unique solved
1,729
Submissions (all)
4,223
Years with activity
2022–2025

Solved by problem rating

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

  • Unrated340
  • 800–899266
  • 900–99957
  • 1000–109947
  • 1100–119980
  • 1200–129967
  • 1300–139963

Solved by topic

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

  • greedy714
  • math512
  • implementation374
  • constructive algorithms365
  • dp358
  • brute force326
  • data structures

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
2025-01-17 16:35Codeforces Round 997 (Div. 2)26+1622116
2025-01-12 16:35Codeforces Round 996 (Div. 2)796-41954
2024-12-24 16:35Educational Codeforces Round 173 (Rated for Div. 2)614-81958
2024-12-20 16:35Codeforces Round 994 (Div. 2)2124-991966
2024-12-08 16:35Codeforces Round 992 (Div. 2)65
1400–1499
63
  • 1500–159953
  • 1600–169961
  • 1700–179971
  • 1800–189968
  • 1900–199992
  • 2000–209976
  • 2100–219988
  • 2200–229969
  • 2300–239957
  • 2400–249936
  • 2500–259929
  • 2600–269914
  • 2700–27996
  • 2800–289910
  • 2900–29998
  • 3000–30995
  • 3100–31991
  • 3200–32992
  • 313
  • sortings216
  • binary search206
  • dfs and similar197
  • trees173
  • graphs168
  • number theory142
  • bitmasks133
  • strings123
  • two pointers117
  • combinatorics100
  • dsu72
  • divide and conquer61
  • games48
  • shortest paths41
  • hashing37
  • geometry30
  • interactive24
  • probabilities23
  • flows17
  • matrices15
  • graph matchings13
  • Other (8 tags)46
  • 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.

    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    LessMore (max 29/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 37/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 44/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 39/day in 2025)

    +112
    2065
    2024-12-03 08:25Codeforces Round 990 (Div. 2)55+981953
    2024-12-02 16:35Educational Codeforces Round 172 (Rated for Div. 2)1032-221855
    2024-10-20 11:05Codeforces Round 980 (Div. 2)534+11877
    2024-10-06 08:05Codeforces Round 977 (Div. 2, based on COMPFEST 16 - Final Round)1232-341876
    2024-06-06 16:35Codeforces Round 951 (Div. 2)368+581910
    2024-05-31 12:05Codeforces Round 949 (Div. 2)793-41852
    2024-05-30 16:35Educational Codeforces Round 166 (Rated for Div. 2)427+691856