| 1978B | New Bakery | | | 800 | 25.6k |
| 1978C | Manhattan Permutations | | | 1300 | 18.1k |
| 1978D | Elections | | | 1600 | 13.9k |
| 1977A | Little Nikita | | | 800 | 39.7k |
| 1977B | Binary Colouring | | | 1100 | 20.1k |
| 1977C | Nikita and LCM | | | 1900 | 8.2k |
| 1976E | Splittable Permutations | | | 2500 | 1.3k |
| 1975B | 378QAQ and Mocha's Array | | | 1000 | 21.3k |
| 1975F | Set | | | 2600 | 1.1k |
| 1975G | Zimpha Fan Club | | | 3000 | 349 |
| 1974A | Phone Desktop | | | 800 | 38.3k |
| 1973A | Chess For Three | | | 900 | 29k |
| 1973B | Cat, Fox and the Lonely Array | | | 1300 | 17.1k |
| 1973C | Cat, Fox and Double Maximum | | | 1700 | 10k |
| 1973D | Cat, Fox and Maximum Array Split | | | 2400 | 2.3k |
| 1973E | Cat, Fox and Swaps | | | 2500 | 1k |
| 1971E | Find the Car | | | 1500 | 18.7k |
| 1971F | Circle Perimeter | | | 1600 | 12.7k |
| 1969A | Two Friends | | | 800 | 22.3k |
| 1969D | Shop Game | | | 1900 | 5.8k |
| 1968A | Maximize? | | | 800 | 39.9k |
| 1968D | Permutation Game | | | 1300 | 17.7k |
| 1968G2 | Division + LCP (hard version) | | | 2200 | 2.6k |
| 1967A | Permutation Counting | | | 1400 | 15.2k |
| 1967B1 | Reverse Card (Easy Version) | | | 1400 | 16.4k |
| 1967B2 | Reverse Card (Hard Version) | | | 2200 | 5k |
| 1967C | Fenwick Tree | | | 2300 | 2.3k |
| 1967E1 | Again Counting Arrays (Easy Version) | | | 3100 | 449 |
| 1967E2 | Again Counting Arrays (Hard Version) | | | 3500 | 231 |
| 1965A | Everything Nim | | | 1400 | 17.2k |
| 1958B | Clock in the Pool | | | 1400 | 1.2k |
| 1957C | How Does the Rook Move? | | | 1600 | 12.2k |
| 1957D | A BIT of an Inequality | | | 1900 | 6k |
| 1957E | Carousel of Combinations | | | 2400 | 1.7k |
| 1956C | Nene's Magical Matrix | | | 1600 | 15.4k |
| 1956D | Nene and the Mex Operator | | | 2000 | 4.9k |
| 1956E1 | Nene vs. Monsters (Easy Version) | | | 2500 | 1.7k |
| 1956E2 | Nene vs. Monsters (Hard Version) | | | 2700 | 1.1k |
| 1955A | Yogurt Sale | | | 800 | 53.6k |
| 1955C | Inhabitant of the Deep Sea | | | 1300 | 25k |
| 1955F | Unfair Game | | | 1800 | 8.9k |
| 1955G | GCD on a grid | | | 1900 | 6.1k |
| 1954A | Painting the Ribbon | | | 900 | 28k |
| 1954B | Make It Ugly | | | 1200 | 21.9k |
| 1954C | Long Multiplication | | | 1200 | 23.2k |
| 1954D | Colored Balls | | | 1800 | 8.4k |
| 1954E | Chain Reaction | | | 2200 | 3k |
| 1954F | Unique Strings | | | 3100 | 430 |
| 1952E | Sweep Line | | | unrated | 346 |
| 1952G | Mathematician Takeover | | | unrated | 1.2k |
| 1951A | Dual Trigger | | | 900 | 22.8k |
| 1951C | Ticket Hoarding | | | 1400 | 13.9k |
| 1951D | Buying Jewels | | | 2000 | 6.4k |
| 1951E | No Palindromes | | | 2000 | 4.6k |
| 1951G | Clacking Balls | | | 3100 | 507 |
| 1950C | Clock Conversion | | | 800 | 47.5k |
| 1949E | Damage per Second | | | 2900 | 154 |
| 1949H | Division Avoidance | | | 3100 | 170 |
| 1949K | Make Triangle | | | 2800 | 482 |
| 1948F | Rare Coins | | | 2500 | 1.7k |
| 1946B | Maximum Sum | | | 1100 | 23.9k |
| 1946E | Girl Permutation | | | 2200 | 3.2k |
| 1945A | Setting up Camp | | | 800 | 30.6k |
| 1945B | Fireworks | | | 900 | 26.5k |
| 1945H | GCD is Greater | | | 2600 | 971 |
| 1944A | Destroying Bridges | | | 800 | 29.3k |
| 1943B | Non-Palindromic Substring | | | 2000 | 4.7k |
| 1943D1 | Counting Is Fun (Easy Version) | | | 2400 | 2k |
| 1942A | Farmer John's Challenge | | | 800 | 18.6k |
| 1942B | Bessie and MEX | | | 1100 | 15.7k |
| 1942C1 | Bessie's Birthday Cake (Easy Version) | | | 1300 | 12.6k |
| 1942C2 | Bessie's Birthday Cake (Hard Version) | | | 1700 | 7k |
| 1942F | Farmer John's Favorite Function | | | 2700 | 1k |
| 1942G | Bessie and Cards | | | 2800 | 786 |
| 1941A | Rudolf and the Ticket | | | 800 | 48.2k |
| 1941B | Rudolf and 121 | | | 1000 | 35.3k |
| 1937A | Shuffle Party | | | 800 | 24.9k |
| 1936A | Bitwise Operation Wizard | | | 1700 | 8.8k |
| 1936B | Pinball | | | 2000 | 3.6k |
| 1936E | Yet Yet Another Permutation Problem | | | 3400 | 155 |
| 1935D | Exam in MAC | | | 1800 | 11k |
| 1935E | Distance Learning Courses in MAC | | | 2400 | 1.7k |
| 1934A | Too Min Too Max | | | 800 | 27.5k |
| 1934B | Yet Another Coin Problem | | | 1200 | 22.4k |
| 1934C | Find a Mine | | | 1700 | 8.2k |
| 1933A | Turtle Puzzle: Rearrange and Negate | | | 800 | 42.5k |
| 1933B | Turtle Math: Fast Three Task | | | 800 | 37k |
| 1933C | Turtle Fingers: Count the Values of k | | | 1100 | 25.7k |
| 1933D | Turtle Tenacity: Continual Mods | | | 1200 | 23.9k |
| 1933E | Turtle vs. Rabbit Race: Optimal Trainings | | | 1500 | 13.9k |
| 1933G | Turtle Magic: Royal Turtle Shell Pattern | | | 2300 | 1.2k |
| 1932C | LR-remainders | | | 1400 | 19.3k |
| 1932E | Final Countdown | | | 1600 | 10.4k |
| 1932G | Moving Platforms | | | 2300 | 1.4k |
| 1931C | Make Equal Again | | | 1000 | 34.4k |
| 1931D | Divisible Pairs | | | 1300 | 32.7k |
| 1931E | Anna and the Valentine's Day Gift | | | 1400 | 27.4k |
| 1931G | One-Dimensional Puzzle | | | 2000 | 3.8k |
| 1930B | Permutation Printing | | | 1000 | 17.9k |
| 1930E | 2..3...4.... Wonderful! Wonderful! | | | 2400 | 1.5k |