数学·driven模式

整数反转

Reverse Integer challenges you to invert the digits of a signed 32-bit integer, handling overflow and negative values ca…

回文数

Determine if a given integer reads the same forward and backward using a math-driven solution strategy without convertin…

阶乘后的零

Given a number n, find how many trailing zeroes are in n! using a math-driven approach.

丑数

The Ugly Number problem asks you to determine if a number is divisible only by 2, 3, or 5.

构造矩形

Given an area, design a rectangle with integer length and width optimizing L >= W and minimal difference, using math.

完美数

Check if a given number is a perfect number by verifying if it's equal to the sum of its divisors, excluding itself.

自除数

Identify self-dividing numbers in a given range by verifying divisibility against their digits.

到达终点

Determine whether it is possible to reach a target point from a start point using repeated additive moves following stri…

负二进制转换

Convert any non-negative integer into its base -2 representation using a math-driven iterative remainder strategy.

质数排列

Calculate the number of valid permutations of 1 to n where prime numbers occupy prime indices using math-driven logic.

一周中的第几天

Given a date, calculate the corresponding weekday using a math-based strategy, focusing on modular arithmetic.

不浪费原料的汉堡制作方案

Determine the exact counts of jumbo and small burgers using all tomato and cheese slices without leftovers, applying mat…

整数的各位积和之差

Calculate the difference between the product and sum of an integer's digits using a simple math-driven approach for effi…

将整数转换为两个无零整数的和

Find two positive integers whose sum equals n and neither contains the digit zero, using a direct math-driven approach.

时钟指针的夹角

Calculate the smaller angle between the hour and minute hands of a clock based on given time inputs.

最接近的因数

Find the closest divisors of num + 1 and num + 2 with minimal absolute difference in this math-driven problem.

在区间范围内统计奇数数目

Count Odd Numbers in an Interval Range efficiently using a math-driven formula that avoids unnecessary iteration over la…

使数组中所有元素相等的最小操作数

Compute the minimum number of operations to equalize a sequential odd-number array using a precise math-driven approach.

计算力扣银行的钱

Calculate the total amount of money in the Leetcode bank at the end of the nth day, based on a weekly increasing deposit…

判断一个数字是否可以表示成三的幂的和

Determine if a number can be expressed as the sum of distinct powers of three using a math-driven strategy.

K 进制表示下的各位数字总和

Calculate the sum of digits of a number after converting it from base 10 to any given base using a math-driven approach.

一个区间内所有数乘积的缩写

Calculate the abbreviated product of integers in a range efficiently using math-driven analysis of trailing zeros and si…

反转两次的数字

Determine if reversing a number twice returns the original integer by analyzing trailing zeros and digit placement.

两整数相加

This problem asks to return the sum of two integers within a specific range, focusing on math-driven solution strategy.