FZU Problem 2104 Floor problem

#include<cstdio>
#include<cstring>
#include<cmath>
using namespace std;
int main()
{
    //freopen("in.txt","r",stdin);
    int cas,n,L,R;
    //long long sum;
    int sum;
    scanf("%d",&cas);
    while(cas--)
    {
        scanf("%d%d%d",&n,&L,&R);
        sum=0;
        for(int i=L;i<=R;i++)
            sum+=floor(n/i);
        //printf("%I64d\n",sum);
        printf("%d\n",sum);
    }
    return 0;
}