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Tang__Tang

Open on Codeforces · Unique solved

Rating2418· Grandmaster

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
27
Unique solved
186
Submissions (all)
540
Years with activity
2023–2025

Solved by problem rating

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

  • 800–89927
  • 900–99913
  • 1000–10994
  • 1100–119912
  • 1200–129915
  • 1300–139914
  • 1400–149916

Solved by topic

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

  • greedy99
  • math86
  • brute force57
  • implementation56
  • constructive algorithms44
  • dp41
  • data structures

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
2025-12-06 10:15Codeforces Round 1069 (Div. 1)17+2492418
2025-11-23 12:35Codeforces Round 1066 (Div. 1 + Div. 2)311+682169
2025-11-16 16:35Codeforces Round 1064 (Div. 1)774-992101
2025-11-06 17:35Codeforces Global Round 30 (Div. 1 + Div. 2)286+722200
2025-10-12 17:05Codeforces Round 1058 (Div. 1)
1500–1599
12
  • 1600–169914
  • 1700–179915
  • 1800–18998
  • 1900–199916
  • 2000–209910
  • 2100–21991
  • 2200–22993
  • 2300–23992
  • 2400–24992
  • 2500–25991
  • 2800–28991
  • 31
  • binary search29
  • sortings28
  • number theory23
  • two pointers16
  • dfs and similar16
  • strings13
  • graphs13
  • bitmasks13
  • combinatorics11
  • trees11
  • interactive8
  • dsu7
  • games6
  • hashing5
  • probabilities4
  • ternary search4
  • fft2
  • divide and conquer2
  • geometry2
  • shortest paths2
  • string suffix structures2
  • 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.

    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 20/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 29/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 10/day in 2025)

    635
    -59
    2128
    2024-10-26 16:35Codeforces Round 982 (Div. 2)10+1822187
    2024-10-06 08:05Codeforces Round 977 (Div. 2, based on COMPFEST 16 - Final Round)162+862005
    2024-09-29 17:35Codeforces Round 976 (Div. 2) and Divide By Zero 9.0402+531919
    2024-09-20 16:35Codeforces Round 973 (Div. 2)324+851866
    2024-09-14 16:35Codeforces Round 972 (Div. 2)1344+41781
    2024-07-28 17:35Pinely Round 4 (Div. 1 + Div. 2)2041-11777
    2024-07-23 16:35Codeforces Round 961 (Div. 2)2573-661778