#include<iostream> using namespace std; long long n,s,t,ans; int judge(long long x){ int sum=0; while(x){ x &= (x-1); sum++; } return sum; } int main(){ cin >> n >> s >> t; for(long long i = s;i <= t;i++){ if(judge(i)<=n){ ans++; } } cout << ans; return 0; }