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Iron_china

Open on Codeforces · Unique solved

Rating2305· International 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
33
Unique solved
230
Submissions (all)
603
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.

  • Unrated43
  • 800–89950
  • 900–9999
  • 1000–10997
  • 1100–11998
  • 1200–129914
  • 1300–13998

Solved by topic

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

  • greedy87
  • math69
  • implementation55
  • constructive algorithms50
  • brute force34
  • dp29
  • 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
2026-02-23 17:05Codeforces Round 1082 (Div. 1)126+962305
2026-02-11 17:35Codeforces Round 1079 (Div. 1)727-1112209
2026-01-17 17:35Codeforces Round 1073 (Div. 1)507-692320
2025-12-27 17:35Good Bye 2025166+872389
2025-12-06 10:15Codeforces Round 1069 (Div. 1)231+5
1400–1499
12
  • 1500–159913
  • 1600–16998
  • 1700–17995
  • 1800–18995
  • 1900–19995
  • 2000–209911
  • 2100–21991
  • 2200–22995
  • 2300–23997
  • 2400–24994
  • 2500–25997
  • 2600–26992
  • 2700–27992
  • 2800–28992
  • 2900–29991
  • 3000–30991
  • 29
  • sortings26
  • number theory22
  • binary search22
  • strings19
  • combinatorics16
  • bitmasks15
  • two pointers13
  • dfs and similar10
  • graphs10
  • games9
  • interactive7
  • trees7
  • divide and conquer7
  • probabilities6
  • dsu4
  • string suffix structures2
  • hashing2
  • ternary search2
  • expression parsing1
  • flows1
  • matrices1
  • Other (5 tags)5
  • 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.

    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 34/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 1/day in 2023)

    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 30/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 62/day in 2026)

    2302
    2025-11-23 12:35Codeforces Round 1066 (Div. 1 + Div. 2)392-32297
    2025-11-06 17:35Codeforces Global Round 30 (Div. 1 + Div. 2)164+952300
    2025-10-24 16:35Codeforces Round 1061 (Div. 2)11+1712205
    2025-10-19 16:35Codeforces Round 1060 (Div. 2)29+1912034
    2025-10-06 16:35Educational Codeforces Round 183 (Rated for Div. 2)1436-311843
    2025-10-05 18:35Codeforces Round 1056 (Div. 2)85+1731874
    2025-09-21 16:50Codeforces Round 1052 (Div. 2)25+3871701