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Top rated · Stats

mahiro_zcy

Open on Codeforces · Unique solved

Rating2214· 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
140
Unique solved
1,243
Submissions (all)
3,363
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.

  • Unrated207
  • 800–899218
  • 900–99943
  • 1000–109943
  • 1100–119968
  • 1200–129960
  • 1300–139962

Solved by topic

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

  • greedy564
  • math479
  • constructive algorithms279
  • implementation273
  • brute force255
  • dp251
  • 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
2026-04-25 17:05Spectral::Cup 2026 Round 1 (Codeforces Round 1094, Div. 1 + Div. 2)504-132214
2026-04-13 16:35Codeforces Round 1093 (Div. 1)163+832227
2026-03-28 17:15Nebius Round 2 (Codeforces Round 1088, Div. 1 + Div. 2)390+562144
2026-03-21 16:35Codeforces Round 1087 (Div. 2)243+142088
2026-03-16 16:50Educational Codeforces Round 188 (Rated for Div. 2)
1400–1499
60
  • 1500–159950
  • 1600–169946
  • 1700–179956
  • 1800–189954
  • 1900–199962
  • 2000–209938
  • 2100–219934
  • 2200–229947
  • 2300–239932
  • 2400–249916
  • 2500–259924
  • 2600–26999
  • 2700–27994
  • 2800–28995
  • 2900–29993
  • 3100–31991
  • 3200–32991
  • 198
  • binary search169
  • sortings144
  • number theory126
  • combinatorics100
  • two pointers95
  • bitmasks94
  • graphs87
  • dfs and similar83
  • strings71
  • trees69
  • games51
  • interactive47
  • divide and conquer44
  • dsu33
  • geometry26
  • probabilities17
  • hashing16
  • ternary search15
  • shortest paths14
  • matrices12
  • graph matchings11
  • Other (9 tags)34
  • 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 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 36/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 46/day in 2026)

    168
    +37
    2074
    2026-03-14 16:35Codeforces Round 1086 (Div. 2)1016-652037
    2026-03-08 17:35Codeforces Round 1085 (Div. 1 + Div. 2)885-602102
    2026-02-23 17:05Codeforces Round 1082 (Div. 1)346+152162
    2026-02-11 17:35Codeforces Round 1079 (Div. 1)384+52147
    2026-02-08 11:05Codeforces Round 1078 (Div. 2)97+462142
    2026-01-29 17:35Codeforces Round 1077 (Div. 1)206+1152096
    2026-01-23 16:35Codeforces Round 1075 (Div. 2)674-201981