FZOJ2104：Floor problem

Problem Description

In this problem, we have f(n,x)=Floor[n/x]. Here Floor[x] is the biggest integer such that no larger than x. For example, Floor[1.1]=Floor[1.9]=1, Floor[2.0]=2.

You are given 3 positive integers n, L and R. Print the result of f(n,L)+f(n,L+1)+...+f(n,R), please.

Input

The first line of the input contains an integer T (T≤100), indicating the number of test cases.

Then T cases, for any case, only 3 integers n, L and R (1≤n, L, R≤10,000, L≤R).

Output

For each test case, print the result of f(n,L)+f(n,L+1)+...+f(n,R) in a single line.

Sample Input

3

1 2 3

100 2 100

100 3 100

Sample Output

0

382

332

 

题意：给出,n,l,r，求所有n/i(l<=i<=r)的和

思路：水题

 

 

#include <stdio.h>
#include <string.h>

int main()
{
	int t,n,l,r,sum,i;
	scanf("%d",&t);
	while(t--)
	{
		scanf("%d%d%d",&n,&l,&r);
		sum = 0;
		for(i = l;i<=r;i++)
			sum+=n/i;
		printf("%d\n",sum);
	}

	return 0;
}