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; } }returnfalse; } 05 小结 算法专题目前...
完全数(PerfectNumber)(Java版) 5、完全数(PerfectNumber) 完全数(完数):如果一个数等于它的因子之和,则称该数为“完数”(或“完全数”)。 例如,6的因子为1、2、3,而 6=1+2+3,因此6是“完数”。 内层循环时,遍历到 “i/2” 即可,因数1和 i ,2和i/2,3和i/3...不包括本身,所以最大遍历到 ...
java 我们只需要找到小于sqrt(n)sqrt(n)的约数就能把数n的所有约数求取出来了。 publicclassSolution{/***@param num:aninteger*@return: returns true when it isaperfect number and false when it is not*/public boolean checkPerfectNumber(intnum) {// write your code hereif(num==1)returnfalse;int...
题意:计算整数N是否为Perfect Number,其定义为满足其所有因数(不包括自身)的和与该数相等; 解法:只需要计算其所有因数并求和后与此数相比较即可,这里需要注意的是给出的整数N可能为负数或零,而Perfect Number要求是正整数; Java class Solution { public boolean checkPerfectNumber(int num) { int sum = 0; ...
public boolean checkPerfectNumber(int num) { if (num == 1) { return false; } int sum = 1, sqrt = (int)Math.sqrt(num); for (int i = 2; i <= sqrt; i ++) { if (num % i == 0) { sum += i + (i * i == num? 0: num / i); ...
Write a Java program to optimize divisor sum calculations using memoization when categorizing numbers between 1 and 10,000. Java Code Editor: Contribute your code and comments through Disqus. Previous:Write a Java program to check whether a given number is an ugly number. ...
Learn how to check if a given number is a perfect number in Java with this simple guide and example code.
Output the Result:Based on the above check, we print whether the number is a perfect square or not. Java Code to Check Whether a Number is a Perfect Square import java.util.Scanner; public class PerfectSquare { // Method to check whether the number is a perfect square ...
Balancer.save(rj, job); /// END: CODE TO INVOKE BALANCER (PART-2) /// . . . } 関連項目: Oracle Big Data Appliance Perfect Balance Java APIリファレンス 4.5.2.2 変更したJavaコードとPerfect Balanceの実行 変更したJavaコードを実行する際には、標準のhadoopコマンド構文を使用してPerf...
information about various metrics for the source code like number of code lines, comments lines, complexities of methods, number of methods, Method Parameters, Nested Block Depth etc. This information is vital for Java code compliance. To view all the Code Metrics collected, select the Metrics ...