面试场景
高频考察问题建模、边界条件与口头表达的清晰度。
常见误区
只背模板不解释为什么，容易在追问里失分。
练习策略
每轮练 3-5 题，固定复盘复杂度和可替代解法。
推荐练习顺序
Nim 游戏
In Nim Game, determine if you can win given a certain number of stones, assuming optimal play from both players.
灯泡开关
Bulb Switcher challenges you to find how many bulbs remain on after n toggling rounds using a math-based insight.
黑板异或游戏
The Chalkboard XOR Game is a game theory problem involving array manipulation and bitwise XOR, where players alternate e…
除数博弈
Divisor Game is a game theory problem where players take turns subtracting divisors of a number n until one player loses…
移动石子直到连续
Solve the "Moving Stones Until Consecutive" problem using math and brainteaser patterns by determining the minimum and m…
飞机座位分配概率
Calculate the probability that the last passenger sits in their assigned seat using state transition dynamic programming…
所有蚂蚁掉下来前的最后一刻
This problem involves simulating ant movement on a plank to determine the last moment before all ants fall off.
严格回文的数字
Determine if a number is strictly palindromic in all bases from 2 to n minus 2 using two-pointer scanning and invariant …
按位与最大的最长子数组
Find the length of the longest subarray whose bitwise AND reaches the array's maximum value, combining array scanning wi…
所有数对的异或和
Compute the overall bitwise XOR from all pairings between two arrays using efficient array and bit manipulation techniqu…
最小无法得到的或值
Find the smallest positive integer that cannot be formed from any subsequence OR combination in the array.
移动机器人
Calculate total distances between robots moving on a number line while accounting for collisions using array plus braint…
构造最长的新字符串
Maximize the length of a string built from AA, BB, and AB without creating triple repeats using DP and greedy logic.
得到整数零需要执行的最少操作数
This problem challenges you to compute the minimum operations to reduce an integer to zero using bit manipulation and st…
字符串元音游戏
Solve the Vowels Game in a String using optimal moves and string analysis to predict the winner efficiently and accurate…
统计计算机解锁顺序排列数
Calculate the total valid unlocking sequences for computers based on their complexity using array and combinatorics logi…