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che960

Open on Codeforces · Unique solved

Rating2163· 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
23
Unique solved
460
Submissions (all)
863
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.

  • Unrated214
  • 800–89941
  • 900–9996
  • 1000–10996
  • 1100–119917
  • 1200–129919
  • 1300–139915

Solved by topic

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

  • greedy126
  • math94
  • constructive algorithms79
  • brute force59
  • dp55
  • implementation45
  • 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
2025-11-28 16:35Educational Codeforces Round 185 (Rated for Div. 2)28+1292163
2025-10-03 17:35Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2)2639-1182034
2025-08-28 17:35Codeforces Round 1046 (Div. 1)352+382152
2025-08-26 16:35Codeforces Round 1045 (Div. 2)222+272114
2025-07-31 17:35Codeforces Round 1040 (Div. 1)
1400–1499
19
  • 1500–15999
  • 1600–169914
  • 1700–179919
  • 1800–18999
  • 1900–199913
  • 2000–209918
  • 2100–219910
  • 2200–229911
  • 2300–23997
  • 2400–24995
  • 2500–25994
  • 2600–26991
  • 2700–27991
  • 2800–28991
  • 3500–35991
  • 39
  • sortings34
  • binary search32
  • number theory30
  • graphs29
  • bitmasks27
  • dfs and similar25
  • trees23
  • interactive22
  • combinatorics20
  • strings15
  • two pointers12
  • *special11
  • games10
  • dsu10
  • shortest paths6
  • geometry6
  • graph matchings4
  • divide and conquer4
  • probabilities3
  • hashing2
  • string suffix structures2
  • Other (6 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.

    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 23/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 23/day in 2026)

    918
    -103
    2087
    2025-07-06 17:35EPIC Institute of Technology Round Summer 2025 (Codeforces Round 1036, Div. 1 + Div. 2)361+442190
    2025-06-15 11:05Codeforces Round 1031 (Div. 2)56+692146
    2025-06-12 16:35Codeforces Round 1030 (Div. 2)294+152077
    2025-05-31 16:35Codeforces Round 1028 (Div. 1)335+1002062
    2025-05-24 16:35Codeforces Round 1026 (Div. 2)469+181962
    2025-05-17 16:50Codeforces Round 1025 (Div. 2)109+1261944
    2025-04-26 11:35Codeforces Round 1021 (Div. 2)762-361818