#include<bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
using mint=modint998244353; //1000000007;
using ll=long long;
using pp=pair<int,int>;
#define sr string 
#define vc vector
#define fi first
#define se second
#define rep(i,n) for(int i=0;i<(int)n;i++)
#define pb push_back
#define all(v) v.begin(),v.end()
#define pque priority_queue
#define bpc(a) __builtin_popcount(a)
int main(){
  int n,x,y;cin>>n>>x>>y; if(x>y)swap(x,y);
  int d=y-x-1; if(y==n)d++; if(x==1)d++;
  vc<mint>dp(d+1,0); dp[1]=1;
  for(int i=2;i<=d;i++){
    dp[i]+=dp[i-1];
    if(i-3>=1)dp[i]+=dp[i-3];
  }
  cout<<dp[d].val();
}