Vova and Train (codeforces 1066A)

我的代码

#include <bits/stdc++.h>
using namespace std;
main()
{
	int n;
	cin>>n;
	while(n--)
	{
		int ll,v,l,r;
		int num=0;int sum=0;
		cin>>ll>>v>>l>>r;
		num=ll/v;sum=r/v-l/v;
		if(l%v==0)
		sum+=1;
		cout<<num-sum<<endl;
	}
}