蓝桥杯 算法训练 ALGO-117 友好数

 1 import java.io.BufferedReader;
 2 import java.io.IOException;
 3 import java.io.InputStreamReader;
 4 
 5 public class Main {
 6     public static void main(String[] args) throws IOException {
 7         BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
 8         String[] str = br.readLine().split(" ");
 9         int m = Integer.parseInt(str[0]);
10         int n = Integer.parseInt(str[1]);
11         int sum_m = f(m);
12         int sum_n = f(n);
13         
14         if(sum_m == n && sum_n == m){
15             System.out.println("yes");
16         }else
17             System.out.println("no");
18         
19     }
20 
21     private static int f(int x) {
22         int sum = 0;
23         for(int i = 1 ; i < x ; i++ ){
24             if(x % i ==0){
25                 sum += i;
26             }
27         }
28         return sum;
29     }
30     
31 }