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VNMengXiong

Open on Codeforces · Unique solved

Rating2173· 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
22
Unique solved
187
Submissions (all)
311
Years with activity
2023–2026

Solved by problem rating

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

  • Unrated2
  • 800–89950
  • 900–99910
  • 1000–109911
  • 1100–119914
  • 1200–129912
  • 1300–139915

Solved by topic

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

  • greedy106
  • math79
  • constructive algorithms50
  • dp42
  • brute force41
  • implementation39
  • strings

Rating changes

2023

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

Jan
Feb
Mar
Apr
May

Submission volume

Download all years PNG

2023

Download PNG

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

Jan
Feb
Mar
Apr

Recent rated rounds

When (UTC)ContestRankΔNew
2026-01-17 17:35Codeforces Round 1073 (Div. 1)747-912173
2026-01-07 17:35Hello 2026652-232264
2024-03-16 17:00Codeforces Round 934 (Div. 1)387-72287
2024-02-23 16:35Educational Codeforces Round 162 (Rated for Div. 2)5+1972294
2024-02-17 17:35think-cell Round 1546+36
1400–1499
8
  • 1500–15996
  • 1600–16996
  • 1700–179912
  • 1800–18999
  • 1900–19996
  • 2000–20996
  • 2100–219912
  • 2200–22992
  • 2400–24991
  • 2500–25992
  • 2600–26991
  • 2700–27991
  • 2800–28991
  • 25
  • data structures23
  • binary search23
  • sortings22
  • games19
  • number theory17
  • dfs and similar16
  • bitmasks13
  • combinatorics13
  • two pointers13
  • trees12
  • graphs11
  • shortest paths5
  • divide and conquer5
  • dsu5
  • interactive3
  • hashing3
  • geometry3
  • fft2
  • string suffix structures1
  • probabilities1
  • 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 10/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 15/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 8/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 9/day in 2026)

    2097
    2024-01-13 16:35Codeforces Round 919 (Div. 2)32+1722061
    2024-01-06 17:05Hello 20241605+131889
    2023-12-30 16:50Good Bye 20233053-561876
    2023-12-24 16:35Codeforces Round 917 (Div. 2)743-151932
    2023-12-18 16:35Educational Codeforces Round 160 (Rated for Div. 2)503-11947
    2023-11-26 16:35Codeforces Round 911 (Div. 2)2785-1511948
    2023-11-07 16:35Codeforces Round 908 (Div. 1)219+1462099