Archive

2024  73

October  6

【题单】字典树基础

October 21, 2024 · 10 min · 2005 words · Xueyang Liu

【题单】对顶堆

October 19, 2024 · 4 min · 688 words · Xueyang Liu

【题单】位运算——拆位法

October 17, 2024 · 3 min · 449 words · Xueyang Liu

【题单】不定长滑动窗口——求最长或最大

October 17, 2024 · 7 min · 1482 words · Xueyang Liu

【题单】二叉树自顶向下 DFS

October 17, 2024 · 10 min · 1998 words · Xueyang Liu

【题单】反转链表

October 17, 2024 · 3 min · 590 words · Xueyang Liu

March  5

LeetCode Contest 390 D 最长公共后缀查询

March 24, 2024 · 5 min · 932 words · Xueyang Liu

CodeForces 1946C Tree Cutting

March 23, 2024 · 10 min · 1962 words · Xueyang Liu

CodeForces 1722G Even-Odd XOR

March 6, 2024 · 4 min · 775 words · Xueyang Liu

CodeForces 1721C Min-Max Array Transformation

March 2, 2024 · 4 min · 849 words · Xueyang Liu

CodeForces 1710A Color the Picture

March 1, 2024 · 5 min · 853 words · Xueyang Liu

February  17

CodeForces 1933C Turtle Fingers: Count the Values of k

February 28, 2024 · 4 min · 836 words · Xueyang Liu

CodeForces 1706C Qpwoeirut And The City

February 28, 2024 · 5 min · 933 words · Xueyang Liu

CodeForces 1701C Schedule Management

February 27, 2024 · 4 min · 797 words · Xueyang Liu

CodeForces 1697C awoos Favorite Problem

February 27, 2024 · 4 min · 827 words · Xueyang Liu

CodeForces 1696C Fishingprince Plays With Array

February 27, 2024 · 5 min · 882 words · Xueyang Liu

CodeForces 1691C Sum of Substrings

February 27, 2024 · 4 min · 814 words · Xueyang Liu

CodeForces 1690E Price Maximization

February 25, 2024 · 4 min · 799 words · Xueyang Liu

CodeForces 1684C Column Swapping

February 25, 2024 · 5 min · 886 words · Xueyang Liu

CodeForces 1682C LIS or Reverse LIS?

February 25, 2024 · 4 min · 756 words · Xueyang Liu

CodeForces 1675E Replace With the Previous, Minimize

February 24, 2024 · 4 min · 821 words · Xueyang Liu

CodeForces 1659C Line Empire

February 24, 2024 · 4 min · 775 words · Xueyang Liu

CodeForces 1654C Alice and the Cake

February 24, 2024 · 4 min · 782 words · Xueyang Liu

CodeForces 1644C Increase Subarray Sums

February 23, 2024 · 4 min · 801 words · Xueyang Liu

CodeForces 1628A Meximum Array

February 23, 2024 · 4 min · 774 words · Xueyang Liu

CodeForces 1624D Palindromes Coloring

February 23, 2024 · 4 min · 757 words · Xueyang Liu

CodeForces 1621B Integers Shop

February 22, 2024 · 4 min · 806 words · Xueyang Liu

CodeForces 1606C Banknotes

February 22, 2024 · 4 min · 803 words · Xueyang Liu

January  45

CodeForces 1605C Dominant Character

January 17, 2024 · 4 min · 767 words · Xueyang Liu

CodeForces 1579D Productive Meeting

January 17, 2024 · 5 min · 889 words · Xueyang Liu

CodeForces 1559D1 Mocha and Diana (Easy Version)

January 17, 2024 · 5 min · 903 words · Xueyang Liu

CodeForces 1553D Backspace

January 17, 2024 · 4 min · 754 words · Xueyang Liu

CodeForces 1552B Running for Gold

January 16, 2024 · 4 min · 794 words · Xueyang Liu

CodeForces 1551B2 Wonderful Coloring - 2

January 16, 2024 · 4 min · 785 words · Xueyang Liu

CodeForces 1548A Web of Lies

January 16, 2024 · 5 min · 862 words · Xueyang Liu

CodeForces 1540A Great Graphs

January 16, 2024 · 4 min · 766 words · Xueyang Liu

CodeForces 1535C Unstable String

January 15, 2024 · 4 min · 820 words · Xueyang Liu

CodeForces 1579C Ticks

January 15, 2024 · 4 min · 850 words · Xueyang Liu

CodeForces 1519C Berland Regional

January 13, 2024 · 4 min · 789 words · Xueyang Liu

CodeForces 1517C Fillomino 2

January 13, 2024 · 4 min · 818 words · Xueyang Liu

CodeForces 1516B AGAGA XOOORRR

January 13, 2024 · 4 min · 818 words · Xueyang Liu

CodeForces 1490F Equalize the Array

January 13, 2024 · 4 min · 849 words · Xueyang Liu

CodeForces 1506D Epic Transformation

January 13, 2024 · 4 min · 741 words · Xueyang Liu

CodeForces 1494B Berland Crossword

January 13, 2024 · 5 min · 863 words · Xueyang Liu

CodeForces 1492C Maximum width

January 13, 2024 · 4 min · 786 words · Xueyang Liu

CodeForces 1573B Swaps

January 12, 2024 · 4 min · 809 words · Xueyang Liu

CodeForces 1551C Interesting Story

January 12, 2024 · 4 min · 804 words · Xueyang Liu

CodeForces 1526C1 Potions (Easy Version)

January 12, 2024 · 4 min · 817 words · Xueyang Liu

CodeForces 1515D Phoenix and Socks

January 11, 2024 · 5 min · 913 words · Xueyang Liu

CodeForces 1466D 13th Labour of Heracles

January 10, 2024 · 4 min · 792 words · Xueyang Liu

CodeForces 1520E Arranging The Sheep

January 10, 2024 · 4 min · 760 words · Xueyang Liu

CodeForces 1515C Phoenix and Towers

January 10, 2024 · 4 min · 793 words · Xueyang Liu

CodeForces 1499C Minimum Grid Path

January 10, 2024 · 4 min · 842 words · Xueyang Liu

CodeForces 1490E Accidental Victory

January 9, 2024 · 4 min · 799 words · Xueyang Liu

CodeForces 1462D Add to Neighbour and Remove

January 9, 2024 · 5 min · 870 words · Xueyang Liu

CodeForces 1463B Find The Array

January 9, 2024 · 4 min · 797 words · Xueyang Liu

CodeForces 1833D Flipper

January 9, 2024 · 4 min · 823 words · Xueyang Liu

CodeForces 1837D Bracket Coloring

January 9, 2024 · 4 min · 827 words · Xueyang Liu

CodeForces 1840D Wooden Toy Festival

January 8, 2024 · 4 min · 809 words · Xueyang Liu

CodeForces 1765N Number Reduction

January 8, 2024 · 4 min · 827 words · Xueyang Liu

CodeForces 1919C Grouping Increases

January 7, 2024 · 5 min · 860 words · Xueyang Liu

牛客小白月赛85 E 烙饼

January 6, 2024 · 5 min · 910 words · Xueyang Liu

牛客小白月赛85 D 阿里马马与四十大盗

January 5, 2024 · 4 min · 817 words · Xueyang Liu

CodeForces 1732D1 Balance (Easy version)

January 5, 2024 · 4 min · 769 words · Xueyang Liu

CodeForces 1744E1 Divisible Numbers (easy version)

January 5, 2024 · 4 min · 829 words · Xueyang Liu

CodeForces 1811E Living Sequence

January 4, 2024 · 4 min · 760 words · Xueyang Liu

CodeForces 1876B Effects of Anti Pimples

January 4, 2024 · 4 min · 829 words · Xueyang Liu

CodeForces 1758C Almost All Multiples

January 4, 2024 · 4 min · 833 words · Xueyang Liu

CodeForces 1804C Pull Your Luck

January 4, 2024 · 4 min · 760 words · Xueyang Liu

CodeForces 1844D Row Major

January 3, 2024 · 4 min · 778 words · Xueyang Liu

洛谷P3371 【模板】单源最短路径（弱化版）

January 1, 2024 · 4 min · 847 words · Xueyang Liu

CodeForces 1916D Mathematical Problem

January 1, 2024 · 5 min · 868 words · Xueyang Liu

CodeForces 1916C Training Before the Olympiad

January 1, 2024 · 4 min · 757 words · Xueyang Liu

2023  102

December  82

洛谷P4779 【模板】单源最短路径（标准版）

December 29, 2023 · 3 min · 537 words · Xueyang Liu

CodeForces 1873G ABBC or BACB

December 29, 2023 · 3 min · 503 words · Xueyang Liu

CodeForces 1915E Romantic Glasses

December 29, 2023 · 2 min · 425 words · Xueyang Liu

CodeForces 1915F Greetings

December 29, 2023 · 3 min · 509 words · Xueyang Liu

CodeForces 1915G Bicycles

December 29, 2023 · 3 min · 619 words · Xueyang Liu

CodeForces 1875C Jellyfish and Green Apple

December 28, 2023 · 3 min · 517 words · Xueyang Liu

CodeForces 1878E Iva & Pav

December 28, 2023 · 3 min · 547 words · Xueyang Liu

CodeForces 1882C Card Game

December 27, 2023 · 3 min · 478 words · Xueyang Liu

CodeForces 1883D In Love

December 27, 2023 · 3 min · 471 words · Xueyang Liu

CodeForces 1883G1 Dances (Easy version)

December 27, 2023 · 3 min · 486 words · Xueyang Liu

CodeForces 1891C Smilo and Monsters

December 27, 2023 · 3 min · 514 words · Xueyang Liu

CodeForces 1896C Matching Arrays

December 27, 2023 · 3 min · 537 words · Xueyang Liu

CodeForces 1898B Milena and Admirer

December 27, 2023 · 3 min · 491 words · Xueyang Liu

CodeForces 1901C Add, Divide and Floor

December 25, 2023 · 3 min · 483 words · Xueyang Liu

蓝桥第2场小白入门赛 数学尖子生

December 25, 2023 · 3 min · 496 words · Xueyang Liu

蓝桥第2场小白入门赛 取余

December 25, 2023 · 3 min · 499 words · Xueyang Liu

CodeForces 1288D Minimax Problem

December 24, 2023 · 3 min · 549 words · Xueyang Liu

CodeForces 1903C Theofanis Nightmare

December 24, 2023 · 3 min · 442 words · Xueyang Liu

CodeForces 1698C 3SUM Closure

December 24, 2023 · 3 min · 527 words · Xueyang Liu

CodeForces 1736C1 Good Subarrays (Easy Version)

December 24, 2023 · 3 min · 486 words · Xueyang Liu

CodeForces 1741D Masha and a Beautiful Tree

December 24, 2023 · 3 min · 489 words · Xueyang Liu

CodeForces 1776H Beppa and SwerChat

December 24, 2023 · 3 min · 477 words · Xueyang Liu

CodeForces 1786B Cake Assembly Line

December 24, 2023 · 3 min · 497 words · Xueyang Liu

CodeForces 1829F Forever Winter

December 24, 2023 · 3 min · 535 words · Xueyang Liu

CodeForces 1618D Array and Operations

December 21, 2023 · 3 min · 440 words · Xueyang Liu

CodeForces 1555C Coin Rows

December 21, 2023 · 3 min · 450 words · Xueyang Liu

CodeForces 1420C1 Pokémon Army (easy version)

December 21, 2023 · 3 min · 431 words · Xueyang Liu

CodeForces 1859C Another Permutation Problem

December 21, 2023 · 3 min · 459 words · Xueyang Liu

CodeForces 1825B LuoTianyi and the Table

December 20, 2023 · 3 min · 514 words · Xueyang Liu

CodeForces 1807G1 Subsequence Addition (Easy Version)

December 20, 2023 · 3 min · 586 words · Xueyang Liu

CodeForces 1443B Saving the City

December 18, 2023 · 3 min · 537 words · Xueyang Liu

CodeForces 1459B Move and Turn

December 18, 2023 · 3 min · 473 words · Xueyang Liu

CodeForces 1466C Canine poetry

December 17, 2023 · 3 min · 437 words · Xueyang Liu

CodeForces 1470A Strange Birthday Party

December 17, 2023 · 3 min · 473 words · Xueyang Liu

CodeForces 1660C Get an Even String

December 16, 2023 · 2 min · 373 words · Xueyang Liu

CodeForces 1661B Getting Zero

December 16, 2023 · 2 min · 424 words · Xueyang Liu

CodeForces 1676G White-Black Balanced Subtrees

December 16, 2023 · 3 min · 457 words · Xueyang Liu

CodeForces 1703F Yet Another Problem About Pairs Satisfying an Inequality

December 16, 2023 · 2 min · 398 words · Xueyang Liu

CodeForces 1766C Hamiltonian Wall

December 16, 2023 · 3 min · 465 words · Xueyang Liu

CodeForces 1834C Game with Reversing

December 16, 2023 · 3 min · 432 words · Xueyang Liu

CodeForces 1594E1 Rubik’s Cube Coloring (easy version)

December 16, 2023 · 2 min · 384 words · Xueyang Liu

CodeForces 1560D Make a Power of Two

December 15, 2023 · 3 min · 452 words · Xueyang Liu

CodeForces 1521B Nastia and a Good Array

December 15, 2023 · 3 min · 484 words · Xueyang Liu

CodeForces 1603A Di-visible Confusion

December 14, 2023 · 3 min · 458 words · Xueyang Liu

CodeForces 1601A Array Elimination

December 13, 2023 · 3 min · 512 words · Xueyang Liu

CodeForces 1617C Paprika and Permutation

December 13, 2023 · 3 min · 464 words · Xueyang Liu

CodeForces 1607D Blue-Red Permutation

December 13, 2023 · 3 min · 443 words · Xueyang Liu

CodeForces 1365B Trouble Sort

December 12, 2023 · 2 min · 419 words · Xueyang Liu

CodeForces 1367C Social Distance

December 12, 2023 · 2 min · 408 words · Xueyang Liu

CodeForces 1381A1 Prefix Flip (Easy Version)

December 12, 2023 · 2 min · 383 words · Xueyang Liu

CodeForces 1647C Madoka and Childish Pranks

December 12, 2023 · 3 min · 502 words · Xueyang Liu

CodeForces 1401C Mere Array

December 11, 2023 · 2 min · 406 words · Xueyang Liu

CodeForces 1425H Huge Boxes of Animal Toys

December 11, 2023 · 2 min · 406 words · Xueyang Liu

CodeForces 1446A Knapsack

December 11, 2023 · 3 min · 540 words · Xueyang Liu

CodeForces 1454D Number into Sequence

December 11, 2023 · 3 min · 437 words · Xueyang Liu

CodeForces 1554D Diane

December 10, 2023 · 2 min · 382 words · Xueyang Liu

CodeForces 1547D Co-growing Sequence

December 10, 2023 · 2 min · 395 words · Xueyang Liu

CodeForces 1659B Bit Flipping

December 10, 2023 · 3 min · 434 words · Xueyang Liu

CodeForces 1753A1 Make Nonzero Sum (easy version)

December 10, 2023 · 2 min · 401 words · Xueyang Liu

CodeForces 1768C Elemental Decompress

December 10, 2023 · 3 min · 574 words · Xueyang Liu

CodeForces 1775B Gardener and the Array

December 10, 2023 · 2 min · 413 words · Xueyang Liu

CodeForces 1498B Box Fitting

December 10, 2023 · 2 min · 408 words · Xueyang Liu

CodeForces 1676F Longest Strike

December 10, 2023 · 3 min · 442 words · Xueyang Liu

CodeForces 1859B Olya and Game with Arrays

December 9, 2023 · 2 min · 407 words · Xueyang Liu

CodeForces 1847B Hamon Odyssey

December 9, 2023 · 2 min · 379 words · Xueyang Liu

CodeForces 1837C Best Binary String

December 9, 2023 · 2 min · 423 words · Xueyang Liu

CodeForces 1836B Astrophysicists

December 8, 2023 · 2 min · 405 words · Xueyang Liu

CodeForces 1834B Maximum Strength

December 8, 2023 · 2 min · 388 words · Xueyang Liu

CodeForces 1821B Sort the Subarray

December 8, 2023 · 2 min · 398 words · Xueyang Liu

CodeForces 1811C Restore the Array

December 8, 2023 · 3 min · 485 words · Xueyang Liu

CodeForces 1809B Points on Plane

December 7, 2023 · 2 min · 416 words · Xueyang Liu

CodeForces 1802B Settlement of Guinea Pigs

December 7, 2023 · 2 min · 373 words · Xueyang Liu

CodeForces 1371C A Cookie for You

December 6, 2023 · 2 min · 362 words · Xueyang Liu

CodeForces 1372B Omkar and Last Class of Math

December 6, 2023 · 3 min · 491 words · Xueyang Liu

CodeForces 1407B Big Vova

December 6, 2023 · 3 min · 431 words · Xueyang Liu

CodeForces 1418B Negative Prefixes

December 6, 2023 · 2 min · 380 words · Xueyang Liu

CodeForces 1422B Nice Matrix

December 3, 2023 · 3 min · 443 words · Xueyang Liu

CodeForces 1476B Inflation

December 3, 2023 · 3 min · 430 words · Xueyang Liu

CodeForces 1561C Deep Down Below

December 3, 2023 · 2 min · 422 words · Xueyang Liu

CodeForces 1734C Removing Smallest Multiples

December 3, 2023 · 3 min · 515 words · Xueyang Liu

CodeForces 1585C Minimize Distance

December 2, 2023 · 3 min · 511 words · Xueyang Liu

CodeForces 1627B Not Sitting

December 2, 2023 · 2 min · 373 words · Xueyang Liu

November  20

CodeForces 1693A Directional Increase

November 30, 2023 · 2 min · 418 words · Xueyang Liu

CodeForces 1649B Game of Ball Passing

November 30, 2023 · 3 min · 427 words · Xueyang Liu

CodeForces 1364B Most socially-distanced subsequence

November 30, 2023 · 2 min · 413 words · Xueyang Liu

CodeForces 1804B Vaccination

November 30, 2023 · 2 min · 396 words · Xueyang Liu

CodeForces 1717C Madoka and Formal Statement

November 26, 2023 · 2 min · 402 words · Xueyang Liu

CodeForces 1810C Make It Permutation

November 26, 2023 · 3 min · 436 words · Xueyang Liu

CodeForces 1733C Parity Shuffle Sorting

November 25, 2023 · 2 min · 413 words · Xueyang Liu

CodeForces 1538C Number of Pairs

November 25, 2023 · 3 min · 499 words · Xueyang Liu

CodeForces 1615B And Its Non-Zero

November 25, 2023 · 2 min · 390 words · Xueyang Liu

CodeForces 1612C Chat Ban

November 24, 2023 · 3 min · 478 words · Xueyang Liu

CodeForces 1692F 3SUM

November 24, 2023 · 2 min · 410 words · Xueyang Liu

CodeForces 1667A Make it Increasing

November 24, 2023 · 3 min · 503 words · Xueyang Liu

CodeForces 1669H Maximal AND

November 23, 2023 · 3 min · 485 words · Xueyang Liu

CodeForces 1650D Twist the Permutation

November 22, 2023 · 3 min · 513 words · Xueyang Liu

CodeForces 1746C Permutation Operations

November 22, 2023 · 3 min · 474 words · Xueyang Liu

CodeForces 1737B Elas Fitness and the Luxury Number

November 21, 2023 · 3 min · 541 words · Xueyang Liu

CodeForces 1778B The Forbidden Permutation

November 21, 2023 · 3 min · 530 words · Xueyang Liu

CodeForces 1788C Matching Numbers

November 20, 2023 · 3 min · 498 words · Xueyang Liu

CodeForces 1794C Scoring Subsequences

November 19, 2023 · 3 min · 465 words · Xueyang Liu

CodeForces 1815A Ian and Array Sorting

November 19, 2023 · 3 min · 495 words · Xueyang Liu