CodeForces - 题库

欢迎来到起遇信息学

起遇信息学正处于上线筹建阶段，以下功能已全部开放免费体验： ✅ 完整题库浏览与代码提交评测（C / C++ / Python / Java 等） ✅ 入门到进阶的系列课程试读、作业与考试 ✅ AI 提示、AI 作业分析等智能助教功能 ✅ 赛事模拟与个人能力报告 ✅ 邮箱注册开放 ⏳ 付费课程订阅与微信/支付宝支付通道 ⏳ 手机号登录，微信扫码登录、微信公众号绑定使用中如遇任何问题，欢迎通过页面底部 **"联系我们"** 与我们沟通。

共 2201 道题

ID	题目显示标签隐藏标签	AC / 尝试	难度
3396	CF1882A Increasing Sequence GESP一级 CodeForces CF-800 贪心	1 / 1	3
3398	CF1883A Morning GESP一级 CodeForces CF-800 数学	1 / 1	3
4059	CF1883B Chemistry GESP一级 CodeForces CF-900 字符串	1 / 1	4
1913	CF1883C Raspberries GESP三级 CodeForces CF-1000 动态规划数学	1 / 1	5
3399	CF1884A Simple Design GESP一级 CodeForces CF-800 枚举贪心数学	1 / 1	3
4678	CF1884B Haunted House GESP五级 CodeForces CF-1100 二分查找贪心数学双指针扫描	1 / 1	5
3401	CF1886A Sum of Three GESP一级 CodeForces CF-800 SPJ 枚举构造数学	1 / 1	3
3400	CF1890A Doremy's Paint 3 GESP一级 CodeForces CF-800 构造	1 / 1	3
3402	CF1890B Qingshan Loves Strings GESP一级 CodeForces CF-800 构造模拟	1 / 1	3
3405	CF1891A Sorting with Twos GESP一级 CodeForces CF-800 构造排序	1 / 1	3
3404	CF1894A Secret Sport GESP一级 CodeForces CF-800 模拟字符串	1 / 1	3
1906	CF1894B Two Out of Three GESP一级 CodeForces CF-1000 SPJ 构造	1 / 1	5
3403	CF1895A Treasure Chest GESP一级 CodeForces CF-800 数学	1 / 1	3
3408	CF1895B Points and Minimum Distance GESP一级 CodeForces CF-800 SPJ 贪心数学排序	1 / 1	3
3406	CF1896A Jagged Swaps GESP一级 CodeForces CF-800 排序	1 / 1	3
4056	CF1896B AB Flipping GESP一级 CodeForces CF-900 贪心字符串双指针扫描	1 / 1	4
3409	CF1898A Milica and String GESP一级 CodeForces CF-800 SPJ 枚举模拟字符串	1 / 1	3
3407	CF1899A Game with Integers GESP二级 CodeForces CF-800 博弈论数学数论	1 / 1	3
4681	CF1899B 250 Thousand Tons of TNT GESP四级 CodeForces CF-1100 枚举模拟数论	1 / 1	5
4680	CF1899C Yarik and Array GESP四级 CodeForces CF-1100 动态规划贪心双指针扫描	1 / 1	5
3411	CF1900A Cover in Water GESP一级 CodeForces CF-800 构造贪心模拟字符串	1 / 1	3
4057	CF1900B Laura and Operations GESP二级 CodeForces CF-900 动态规划数学	1 / 1	4
3410	CF1901A Line Trip GESP一级 CodeForces CF-800 贪心数学	1 / 1	3
3412	CF1902A Binary Imbalance GESP一级 CodeForces CF-800 构造	1 / 1	3
4682	CF1902B Getting Points GESP五级 CodeForces CF-1100 二分查找枚举贪心	1 / 1	5
3413	CF1903A Halloumi Boxes GESP一级 CodeForces CF-800 枚举贪心排序	1 / 1	3
4058	CF1904A Forked! GESP一级 CodeForces CF-900 枚举模拟	1 / 1	4
4686	CF1904B Collecting Game GESP五级 CodeForces CF-1100 二分查找动态规划贪心排序双指针扫描	1 / 1	5
3414	CF1905A Constructive Problems GESP一级 CodeForces CF-800 构造数学	1 / 1	3
4684	CF1905B Begginer's Zelda GESP四级 CodeForces CF-1100 贪心树的分治	1 / 1	5
1903	CF1906A Easy As ABC GESP一级 CodeForces CF-1000 枚举	1 / 1	5
3416	CF1907A Rook GESP一级 CodeForces CF-800 SPJ 模拟	1 / 1	3
2630	CF1907B YetnotherrokenKeoard GESP一级 CodeForces CF-1000 数据结构模拟字符串	1 / 1	5
3415	CF1909A Distinct Buttons GESP一级 CodeForces CF-800 模拟数学	1 / 1	3
3417	CF1912L LOL Lovers GESP一级 CodeForces CF-800 SPJ 字符串	1 / 1	3
3435	CF1913A Rating Increase GESP一级 CodeForces CF-800 SPJ 模拟	1 / 1	3
1905	CF1913B Swap and Delete GESP二级 CodeForces CF-1000 字符串	1 / 1	5
3418	CF1914A Problemsolving Log GESP一级 CodeForces CF-800 模拟字符串	1 / 1	3
3419	CF1914B Preparing for the Contest GESP一级 CodeForces CF-800 SPJ 构造数学	1 / 1	3
4687	CF1914C Quests GESP二级 CodeForces CF-1100 贪心数学	1 / 1	5
3420	CF1915A Odd One Out GESP一级 CodeForces CF-800 位运算模拟	1 / 1	3
3421	CF1915B Not Quite Latin Square GESP一级 CodeForces CF-800 位运算枚举模拟	1 / 1	3
3422	CF1915C Can I Square? GESP五级 CodeForces CF-800 二分查找模拟	1 / 1	3
4230	CF1915D Unnatural Language Processing GESP一级 CodeForces CF-900 SPJ 贪心模拟字符串	1 / 1	4
3423	CF1916A 2023 GESP二级 CodeForces CF-800 构造模拟数学数论	1 / 1	3
1912	CF1916B Two Divisors GESP三级 CodeForces CF-1000 SPJ 构造数学数论	1 / 1	5
3424	CF1917A Least Product GESP一级 CodeForces CF-800 构造数学	1 / 1	3
4689	CF1917B Erase First or Second Letter GESP四级 CodeForces CF-1100 枚举组合数学数据结构动态规划字符串	1 / 1	5
3425	CF1918A Brick Wall GESP一级 CodeForces CF-800 构造贪心模拟数学	1 / 1	3
4063	CF1918B Minimize Inversions GESP一级 CodeForces CF-900 SPJ 构造数据结构贪心模拟排序	1 / 1	4
3426	CF1919A Wallet Exchange GESP一级 CodeForces CF-800 博弈论数学	1 / 1	3
3427	CF1919B Plus-Minus Split GESP一级 CodeForces CF-800 贪心	1 / 1	3
3438	CF1920A Satisfying Constraints GESP一级 CodeForces CF-800 枚举贪心数学	1 / 1	3
4688	CF1920B Summation Game GESP二级 CodeForces CF-1100 博弈论贪心数学排序	1 / 1	5
3428	CF1921A Square GESP一级 CodeForces CF-800 贪心数学	1 / 1	3
3429	CF1921B Arranging Cats GESP一级 CodeForces CF-800 贪心模拟	1 / 1	3
4061	CF1921C Sending Messages GESP一级 CodeForces CF-900 贪心数学	1 / 1	4
4693	CF1921D Very Different Array GESP三级 CodeForces CF-1100 数据结构贪心排序双指针扫描	1 / 1	5
3430	CF1922A Tricky Template GESP一级 CodeForces CF-800 构造模拟字符串	1 / 1	3
3431	CF1923A Moving Chips GESP一级 CodeForces CF-800 贪心模拟	1 / 1	3
4691	CF1923B Monsters Attack! GESP四级 CodeForces CF-1100 动态规划贪心模拟	1 / 1	5
3434	CF1925A We Got Everything Covered! GESP一级 CodeForces CF-800 SPJ 构造贪心字符串	1 / 1	3
3432	CF1926A Vlad and the Best of Five GESP一级 CodeForces CF-800 模拟	1 / 1	3
3433	CF1926B Vlad and Shapes GESP一级 CodeForces CF-800 几何知识模拟	1 / 1	3
3437	CF1927A Make it White GESP一级 CodeForces CF-800 贪心字符串	1 / 1	3
4064	CF1927B Following the String GESP一级 CodeForces CF-900 SPJ 构造贪心字符串	1 / 1	4
1911	CF1927C Choose the Different Ones! GESP一级 CodeForces CF-1000 枚举贪心数学	1 / 1	5
3440	CF1928A Rectangle Cutting GESP一级 CodeForces CF-800 几何知识数学	1 / 1	3
3439	CF1929A Sasha and the Beautiful Array GESP一级 CodeForces CF-800 构造贪心数学排序	1 / 1	3
3442	CF1929B Sasha and the Drawing GESP一级 CodeForces CF-800 构造贪心数学	1 / 1	3
3441	CF1930A Maximise The Score GESP一级 CodeForces CF-800 贪心排序	1 / 1	3
1908	CF1930B Permutation Printing GESP一级 CodeForces CF-1000 SPJ 枚举构造数学	1 / 1	5
3443	CF1931A Recovering a Small String GESP一级 CodeForces CF-800 枚举字符串	1 / 1	3
3444	CF1931B Make Equal GESP一级 CodeForces CF-800 贪心	1 / 1	3
1910	CF1931C Make Equal Again GESP一级 CodeForces CF-1000 枚举贪心数学	1 / 1	5
3445	CF1932A Thorns and Coins GESP二级 CodeForces CF-800 动态规划贪心模拟	1 / 1	3
4694	CF1932B Chaya Calendar GESP四级 CodeForces CF-1100 数论	1 / 1	5
3446	CF1933A Turtle Puzzle: Rearrange and Negate GESP一级 CodeForces CF-800 贪心数学排序	1 / 1	3
3447	CF1933B Turtle Math: Fast Three Task GESP二级 CodeForces CF-800 模拟数学数论	1 / 1	3
4695	CF1933C Turtle Fingers: Count the Values of k GESP四级 CodeForces CF-1100 枚举模拟数学数论	1 / 1	5
3448	CF1934A Too Min Too Max GESP一级 CodeForces CF-800 贪心数学	1 / 1	3
3449	CF1935A Entertainment in MAC GESP一级 CodeForces CF-800 构造字符串	1 / 1	3
3450	CF1937A Shuffle Party GESP一级 CodeForces CF-800 模拟数学	1 / 1	3
3451	CF1941A Rudolf and the Ticket GESP一级 CodeForces CF-800 枚举数学	1 / 1	3
1916	CF1941B Rudolf and 121 GESP三级 CodeForces CF-1000 枚举动态规划贪心数学	1 / 1	5
4062	CF1941C Rudolf and the Ugly String GESP二级 CodeForces CF-900 动态规划贪心字符串	1 / 1	4
3453	CF1942A Farmer John's Challenge GESP一级 CodeForces CF-800 SPJ 构造数学	1 / 1	3
3452	CF1944A Destroying Bridges GESP二级 CodeForces CF-800 图结构贪心数学	1 / 1	3
4697	CF1944B Equal XOR GESP二级 CodeForces CF-1100 SPJ 位运算构造	1 / 1	5
3454	CF1945A Setting up Camp GESP一级 CodeForces CF-800 贪心数学	1 / 1	3
4066	CF1945B Fireworks GESP二级 CodeForces CF-900 数学数论	1 / 1	4
3455	CF1946A Median of an Array GESP一级 CodeForces CF-800 贪心模拟排序	1 / 1	3
4696	CF1946B Maximum Sum GESP四级 CodeForces CF-1100 动态规划贪心数学	1 / 1	5
3456	CF1948A Special Characters GESP一级 CodeForces CF-800 SPJ 枚举构造	1 / 1	3
4699	CF1948B Array Fix GESP四级 CodeForces CF-1100 枚举动态规划贪心模拟	1 / 1	5
3459	CF1950A Stair, Peak, or Neither? GESP一级 CodeForces CF-800 模拟	1 / 1	3
3457	CF1950B Upscaling GESP一级 CodeForces CF-800 模拟	1 / 1	3
3458	CF1950C Clock Conversion GESP一级 CodeForces CF-800 模拟数学	1 / 1	3
4700	CF1950D Product of Binary Decimals GESP四级 CodeForces CF-1100 枚举动态规划模拟数论	1 / 1	5
4068	CF1951A Dual Trigger GESP一级 CodeForces CF-900 构造贪心数学	1 / 1	4

分类

试试手气

根据当前过滤条件随机选择一道题

分类

还没有账户？

登录