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Basics of Sorting
Master sorting and the ideas built on it — 100 CodeForces problems tagged sortings, laddered from 800 up to 1400 across every rating tier.
100 problems15 rated 80015 rated 90014 rated 100014 rated 110014 rated 120014 rated 130014 rated 1400
| # | Problem | Rating | Status | Links |
|---|---|---|---|---|
| 001 | Helpful Maths339A | 800 | ||
| 002 | Amusing Joke141A | 800 | ||
| 003 | The New Year: Meeting Friends723A | 800 | ||
| 004 | Halloumi Boxes1903A | 800 | ||
| 005 | Remove Smallest1399A | 800 | ||
| 006 | Medium Number1760A | 800 | ||
| 007 | To My Critics1850A | 800 | ||
| 008 | Team Olympiad490A | 800 | ||
| 009 | Choosing Teams432A | 800 | ||
| 010 | Increasing1742B | 800 | ||
| 011 | Equal Candies1676B | 800 | ||
| 012 | Jagged Swaps1896A | 800 | ||
| 013 | My First Sorting Problem1971A | 800 | ||
| 014 | Square?2167A | 800 | ||
| 015 | Two Arrays And Swaps1353B | 800 | ||
| 016 | Twins160A | 900 | ||
| 017 | Gravity Flip405A | 900 | ||
| 018 | Sale34B | 900 | ||
| 019 | Balanced Round1850D | 900 | ||
| 020 | Business trip149A | 900 | ||
| 021 | Array Reodering1535B | 900 | ||
| 022 | Array Cloning Technique1665B | 900 | ||
| 023 | Game of Mathletes2060C | 900 | ||
| 024 | Promo1697B | 900 | ||
| 025 | Oath of the Night's Watch768A | 900 | ||
| 026 | Shifted MEX2185C | 900 | ||
| 027 | Restore the Weather1833B | 900 | ||
| 028 | Minimize Inversions1918B | 900 | ||
| 029 | Submission Bait1990A | 900 | ||
| 030 | Heapify 12195B | 900 | ||
| 031 | Dragons230A | 1000 | ||
| 032 | Monsters1849B | 1000 | ||
| 033 | Olya and Game with Arrays1859B | 1000 | ||
| 034 | Bogosort1312B | 1000 | ||
| 035 | Mahmoud and a Triangle766B | 1000 | ||
| 036 | Helmets in Night Light1876A | 1000 | ||
| 037 | Progressive Square1955B | 1000 | ||
| 038 | Matrix Stabilization1986B | 1000 | ||
| 039 | Valerii Against Everyone1438B | 1000 | ||
| 040 | Divan and a New Project 1614B | 1000 | ||
| 041 | Basketball Together1725B | 1000 | ||
| 042 | Farmer John's Card Game2060B | 1000 | ||
| 043 | Towers37A | 1000 | ||
| 044 | Crafting2055B | 1000 | ||
| 045 | Laptops456A | 1100 | ||
| 046 | Building an Aquarium1873E | 1100 | ||
| 047 | A and B and Compilation Errors519B | 1100 | ||
| 048 | Negatives and Positives1791E | 1100 | ||
| 049 | Two Teams Composing1335C | 1100 | ||
| 050 | Maximum Sum1832B | 1100 | ||
| 051 | Similar Pairs1360C | 1100 | ||
| 052 | Teleporters (Easy Version)1791G1 | 1100 | ||
| 053 | Eating Queries1676E | 1100 | ||
| 054 | Binary Cut1971D | 1100 | ||
| 055 | Deja Vu1891B | 1100 | ||
| 056 | Counting Orders1827A | 1100 | ||
| 057 | Collecting Game1904B | 1100 | ||
| 058 | Subsequence Addition (Hard Version)1807G2 | 1100 | ||
| 059 | Vanya and Lanterns492B | 1200 | ||
| 060 | BerSU Ball489B | 1200 | ||
| 061 | Kuriyama Mirai's Stones433B | 1200 | ||
| 062 | Less or Equal977C | 1200 | ||
| 063 | Assembly via Minimums1857C | 1200 | ||
| 064 | Three Activities1914D | 1200 | ||
| 065 | Matryoshkas1790D | 1200 | ||
| 066 | Stable Groups1539C | 1200 | ||
| 067 | Friends and the Restaurant1729D | 1200 | ||
| 068 | Playing in a Casino1808B | 1200 | ||
| 069 | Even-Odd Game1472D | 1200 | ||
| 070 | Balanced Team1133C | 1200 | ||
| 071 | Sorted Adjacent Differences1339B | 1200 | ||
| 072 | Sort1996C | 1200 | ||
| 073 | Sort the Array451B | 1300 | ||
| 074 | Pashmak and Flowers459B | 1300 | ||
| 075 | Queries about less or equal elements600B | 1300 | ||
| 076 | Yet Another Problem About Pairs Satisfying an Inequality1703F | 1300 | ||
| 077 | Strong Vertices1857D | 1300 | ||
| 078 | Strange Birthday Party1470A | 1300 | ||
| 079 | Queue545D | 1300 | ||
| 080 | Mere Array1401C | 1300 | ||
| 081 | Balanced Tunnel1237B | 1300 | ||
| 082 | Deep Down Below1561C | 1300 | ||
| 083 | Longest Strike1676F | 1300 | ||
| 084 | New Game2025C | 1300 | ||
| 085 | Slay the Dragon1574C | 1300 | ||
| 086 | 17092121D | 1300 | ||
| 087 | Pair of Topics1324D | 1400 | ||
| 088 | Maximum Median1201C | 1400 | ||
| 089 | Exams479C | 1400 | ||
| 090 | Zero Remainder Array1374D | 1400 | ||
| 091 | Drazil and Factorial515C | 1400 | ||
| 092 | Phoenix and Beauty1348B | 1400 | ||
| 093 | 2^Sort1692G | 1400 | ||
| 094 | Anna and the Valentine's Day Gift1931E | 1400 | ||
| 095 | Array Game1904C | 1400 | ||
| 096 | Berland Regional1519C | 1400 | ||
| 097 | Create The Teams1380C | 1400 | ||
| 098 | Journey Planning1320A | 1400 | ||
| 099 | Candy Box (easy version)1183D | 1400 | ||
| 100 | RationalLee1369C | 1400 |
“Open in app” uses the cpally:// protocol and opens the problem directly in CP Ally IDE.