codeforce F. Multicolored Markers

 1 import java.util.*;
 2 
 3 public class A {
 4     public static void main(String[] args) {
 5         Scanner io = new Scanner(System.in);
 6         long a = io.nextLong(), b = io.nextLong(), c = a + b;
 7         long min = 0, max = 0;
 8 
 9         for (long i = (long) Math.sqrt(c); i >= 1; i--) {
10             if (c % i == 0) {
11                 min = i;
12                 max = c / i;
13 
14                 //当两个因数差距越来越大时，max的长度比min大一倍多，所以max妥妥超时
15                 for (long j = min; j >= 1; j--) {
16                     if (a % j == 0 && a / j <= max || b % j == 0 && b / j <= max) {
17                         System.out.println((min + max) * 2);
18                         return;
19                     }
20                 }
21             }
22         }
23 
24     }
25 }