Number 1

/*
              9
      4       1       4
  2   0   2   1   2   0   2
1 0 1 0 1 0 1 1 1 0 1 0 1 0 1
*/
/*
	Task	: _example
	Author	: Phumipat C. [MAGCARI]
	Language: C++
	Created	: 19 February 2023 [10:59]
*/
#include<bits/stdc++.h>
using namespace std;
int divide(int leftBoundary,int rightBoundary,int number,int leftConsidering,int rightConsidering){
	if(rightBoundary < leftConsidering || leftBoundary > rightConsidering)	return 0;
	if(number <= 1)	return number;
	int mid = (leftBoundary+rightBoundary-1)/2;
	int leftResult = divide(leftBoundary,mid,number/2,leftConsidering,rightConsidering);
	int middleResult = number%2;
	int rightResult = divide(mid+2,rightBoundary,number/2,leftConsidering,rightConsidering);
	return leftResult + middleResult + rightResult;
}
int main(){
	int startNumber,l,r;
	scanf("%d %d %d",&startNumber,&l,&r);
	int n = 1;
	while(n < startNumber)	n = (2*n) + 1;
	printf("%d\n",divide(1,n,startNumber,l,r));
	return 0;
}