当然,你要是把int范围内的5个Perfect Number(第5个是33550336)都找出来了,直接做判断也行。 publicbooleancheckPerfectNumber3(intnum){int[] primes = {2,3,5,7,13};for(intp: primes) {if((1<< (p -1)) * ((1<< p) -1) == num) {returntrue; } }
Time Complexity: O(Math.sqrt(num)). Space: O(1). AC Java: 1publicclassSolution {2publicbooleancheckPerfectNumber(intnum) {3if(num == 1){4returnfalse;5}67intsum = 1;8for(inti = 2; i<Math.sqrt(num); i++){9if(num%i == 0){10sum += i+num/i;11}12}13returnsum ==num;14...
public: bool checkPerfectNumber(int num) { if (num == 1) return false; int sum = 1; for (int i= 2; i <= (int)sqrt(num); i++) { if (num%i == 0) { sum += i; if (i != num / i) sum += num / i; } } return sum == num; } }; 1. 2. 3. 4. 5. 6. 7...
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A comprehensive resource for learning and implementing algorithms and data structures. This repository includes detailed notes, complexity analysis, and code examples in C++, Java, Python, and more. Ideal for students, professionals, and those preparing
完美数 https://leetcode-cn.com/problems/perfect-number/ 难度:简单 解题思路: 设计一个判断单个数是否是自除数的函数,比如取名为IsSelfDIv() IsSelfDIv函数的要点是: 排除数位中含有0的数 排除原数不是末位数字倍数的数 遍历原数列,对每一个数调用一次进行IsSelfDIv函数,将满足要求的加入List中即可 ...
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This is why we developed a customization capability for <a href="https://aws.amazon.com/codewhisperer/" target="_blank" rel="noopener">Amazon CodeWhisperer</a>. In this post, we show you two possible ways of customizing coding companions using retrieval augmented generation and fine-tuning....
Note that some processors use PUSH/PULL, but in the Intel world, we use PUSH/POP. This is just a "mnemonic" anyway, which basically means an English word for a machine operation. All assembly boils down to an opcode or number which is processed by the CPU. That means, you can call ...
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