这玩以还可以，前面十组算分的都过了，第11组却WA了，求解

#include <bits/stdc++.h>
using namespace std;

int main()
{
	long long n, l, r;
	scanf("%lld %lld %lld", &n, &l, &r);
	
	for (int i = 1; ; i++)
	{
		if ((long long)(i) * n > l)
		{
			long long result = 0;
			if ((long long)(i) * n > r)
			{
				result = r - ((long long)(i) - 1) * n; 
			} 
			else
			{
				result = ((long long)(i) * n - 1) - (((long long)(i) - 1) * n); 
			}
			if (result)
			{
				printf("%lld\n", result);
				break;
			}
		}
	}
	return 0;
}