View Code of Problem 27

#include<stdio.h>
#include<math.h>
int su(int n)
{
	int i,flag=0;
	if(n==2)
	flag=1;
	for(i=2;i<=sqrt(n);i++)
	if(n%i==0)
	{  
    flag=1;
	break;
	}
return flag;

}
int main()
{
int n,m,i;double sum=0.0;
while(scanf("%d%d",&n,&m)!=EOF)
{
for(i=n+1;i<m;i++)
{if(!su(i))
sum+=i;
}
printf("%0.lf\n",sum);
sum=0.0;
}
}