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Top rated · Stats

Friedrich

Open on Codeforces · Unique solved

Rating2249· 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
83
Unique solved
1,528
Submissions (all)
5,157
Years with activity
2022–2026

Solved by problem rating

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

  • Unrated346
  • 800–899213
  • 900–99938
  • 1000–109946
  • 1100–119960
  • 1200–129964
  • 1300–139955

Solved by topic

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

  • greedy568
  • math471
  • constructive algorithms312
  • implementation304
  • brute force286
  • dp281
  • 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
2026-03-08 17:35Codeforces Round 1085 (Div. 1 + Div. 2)312+62249
2026-01-29 17:35Codeforces Round 1077 (Div. 1)339-232243
2026-01-17 17:35Codeforces Round 1073 (Div. 1)470-442266
2025-12-27 17:35Good Bye 2025206+942310
2025-12-19 17:05Codeforces Global Round 31 (Div. 1 + Div. 2)1031
1400–1499
51
  • 1500–159942
  • 1600–169940
  • 1700–179955
  • 1800–189960
  • 1900–199962
  • 2000–209944
  • 2100–219946
  • 2200–229967
  • 2300–239979
  • 2400–249944
  • 2500–259947
  • 2600–269935
  • 2700–27999
  • 2800–28997
  • 2900–29994
  • 3000–30998
  • 3100–31993
  • 3300–33993
  • 221
  • binary search198
  • sortings157
  • graphs131
  • number theory116
  • dfs and similar113
  • combinatorics107
  • bitmasks104
  • two pointers100
  • strings97
  • trees96
  • games55
  • interactive51
  • dsu46
  • divide and conquer40
  • shortest paths35
  • geometry29
  • hashing24
  • probabilities23
  • ternary search14
  • matrices12
  • graph matchings11
  • Other (9 tags)47
  • 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.

    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 5/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 61/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 46/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 106/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 68/day in 2026)

    -68
    2216
    2025-12-06 10:15Codeforces Round 1069 (Div. 1)403-602284
    2025-11-23 12:35Codeforces Round 1066 (Div. 1 + Div. 2)130+1012344
    2025-11-06 17:35Codeforces Global Round 30 (Div. 1 + Div. 2)230+792243
    2025-10-30 19:35Pinely Round 5 (Div. 1 + Div. 2)377+32164
    2025-10-12 17:05Codeforces Round 1058 (Div. 1)572-462161
    2025-10-03 17:35Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2)310+742207
    2025-09-24 14:50Codeforces Round 1053 (Div. 1)650-452133