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JOO91

Open on Codeforces · Unique solved

Rating2183· 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
24
Unique solved
1,486
Submissions (all)
2,439
Years with activity
2024–2026

Solved by problem rating

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

  • Unrated408
  • 800–899217
  • 900–99956
  • 1000–109966
  • 1100–119988
  • 1200–129972
  • 1300–139989

Solved by topic

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

  • greedy480
  • math397
  • implementation331
  • constructive algorithms233
  • brute force231
  • dp192
  • data structures

Rating changes

2024

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2024

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2024-08-25 16:35Codeforces Round 968 (Div. 2)35+1222183
2024-08-20 16:35Codeforces Round 967 (Div. 2)224+442061
2024-08-15 16:35Educational Codeforces Round 169 (Rated for Div. 2)409+242017
2024-08-11 17:35EPIC Institute of Technology Round August 2024 (Div. 1 + Div. 2)700+661993
2024-08-10 16:35Codeforces Round 965 (Div. 2)
1400–1499
78
  • 1500–159959
  • 1600–169962
  • 1700–179955
  • 1800–189953
  • 1900–199966
  • 2000–209947
  • 2100–219922
  • 2200–229920
  • 2300–239912
  • 2400–24999
  • 2500–25992
  • 2600–26993
  • 2700–27991
  • 2900–29991
  • 179
  • sortings171
  • binary search138
  • dfs and similar118
  • strings116
  • graphs112
  • number theory112
  • trees87
  • bitmasks76
  • two pointers70
  • combinatorics61
  • dsu46
  • games43
  • shortest paths38
  • geometry23
  • hashing23
  • divide and conquer23
  • string suffix structures16
  • interactive10
  • probabilities7
  • matrices6
  • ternary search6
  • Other (8 tags)23
  • 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 299/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 32/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 38/day in 2026)

    321
    +74
    1927
    2024-07-30 16:35Educational Codeforces Round 168 (Rated for Div. 2)272+1271853
    2024-07-28 17:35Pinely Round 4 (Div. 1 + Div. 2)2224+51726
    2024-07-20 16:35Codeforces Round 960 (Div. 2)1459+131721
    2024-07-18 16:35Codeforces Round 959 sponsored by NEAR (Div. 1 + Div. 2)2123+131708
    2024-07-15 16:35Codeforces Round 958 (Div. 2)5284-1041695
    2024-06-30 17:35EPIC Institute of Technology Round Summer 2024 (Div. 1 + Div. 2)1588+91799
    2024-06-09 17:35Codeforces Global Round 262754-601790