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wzc_IOI_czw

Open on Codeforces · Unique solved

Rating2586· Grandmaster

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
27
Unique solved
1,044
Submissions (all)
3,229
Years with activity
2021–2025

Solved by problem rating

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

  • Unrated11
  • 800–899120
  • 900–99926
  • 1000–109934
  • 1100–119933
  • 1200–129933
  • 1300–139946

Solved by topic

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

  • greedy396
  • math376
  • dp300
  • constructive algorithms268
  • implementation216
  • data structures212

Rating changes

2021

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2021

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2024-08-30 17:05Codeforces Round 969 (Div. 1)16+2362586
2024-06-09 17:35Codeforces Global Round 26320+222350
2024-05-25 17:35Codeforces Round 947 (Div. 1 + Div. 2)286+162328
2024-03-30 17:35CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)190+922312
2024-03-16 17:00Codeforces Round 934 (Div. 1)
1400–1499
36
  • 1500–159936
  • 1600–169940
  • 1700–179938
  • 1800–189939
  • 1900–199961
  • 2000–209958
  • 2100–219938
  • 2200–229932
  • 2300–239944
  • 2400–249938
  • 2500–259941
  • 2600–269938
  • 2700–279916
  • 2800–289957
  • 2900–299916
  • 3000–309928
  • 3100–319920
  • 3200–329922
  • 3300–339916
  • 3400–34996
  • 3500–359921
  • brute force
    196
  • graphs136
  • binary search127
  • sortings126
  • dfs and similar118
  • trees112
  • combinatorics104
  • number theory94
  • bitmasks84
  • strings71
  • two pointers58
  • interactive42
  • games40
  • dsu39
  • geometry36
  • shortest paths31
  • divide and conquer30
  • probabilities26
  • hashing20
  • flows18
  • matrices15
  • *special12
  • Other (8 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.

    2022

    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.

    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.

    May
    Jun
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec

    LessMore (max 10/day in 2021)

    2022

    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 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 71/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 53/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 16/day in 2025)

    172
    +129
    2220
    2023-10-22 13:05Codeforces Round 905 (Div. 2)30+1432091
    2023-10-22 09:05Codeforces Round 904 (Div. 2)892-551948
    2023-07-11 17:35Codeforces Round 884 (Div. 1 + Div. 2)2247-1002003
    2023-06-03 16:35Codeforces Round 876 (Div. 2)29+1402103
    2023-03-18 14:20Codeforces Round 858 (Div. 2)109+1041963
    2023-03-09 12:35Codeforces Round 857 (Div. 2)452-181859
    2023-02-25 16:20Codeforces Round 853 (Div. 2)383+341877