View Code of Problem 27

import java.util.*;
class Main{
  public static void main(String[] args){
  Scanner sc=new Scanner(System.in);
  while(sc.hasNext()){
      int a=sc.nextInt();
      int b=sc.nextInt();
      int sum=0;
      if(a>b){
          int temp=a;
          a=b;
          b=temp;
      }//if
    for(int i=a+1;i<b;i++){
      if(Main.judge(i)){
       sum+=i;
      }//if
    }//for
    System.out.println(sum);
  }//while
  }//main
  public static boolean judge(int a){
    if(a==1){return false;}
    for(int i=2;i<a;i++){if(a%i==0){return false;}}
    return true;
  }
}