View Code of Problem 27

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