题解 | #求最小公倍数#
求最小公倍数
https://www.nowcoder.com/practice/22948c2cad484e0291350abad86136c3
import java.util.*;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
// 注意 hasNext 和 hasNextLine 的区别
while (in.hasNextInt()) { // 注意 while 处理多个 case
int a = in.nextInt();
int b = in.nextInt();
ArrayList<Integer> la = new ArrayList<>();
ArrayList<Integer> lb = new ArrayList<>();
int i = 2;
while(a>1){
if(a%i==0){
la.add(i);
a=a/i;
}else i++;
}
i = 2;
while(b>1){
if(b%i==0){
lb.add(i);
b=b/i;
}else i++;
}
ArrayList<Integer> lc = new ArrayList<>();
for(int ga:la){
for(int gb:lb){
if(ga==gb) {
lc.add(ga);
break;
}
}
}
int sum = 1;
for(int g:la){
sum = sum*g;
}
for(int g:lb){
sum = sum*g;
}
if(lc.size()!=0){
for(int g:lc){
sum = sum/g;
}
}
System.out.println(sum);
}
}
}