View Code of Problem 27

#include <stdio.h>
int main(){
  int a,b;
  int i,j;
  int sum;
  while (scanf("%d%d",&a,&b) != EOF){
	  sum=0;
    for(i=a+1;i<b;i++){
      for(j=2;j<i;j++){
        if(i%j==0)
			break;
	  }
        if(j==i){
          sum+=i;
          
        
        }
      
      }
      printf("%d\n",sum);
    
    }
    
  
  
 
return 0;
}