//Desinged by AzeTurk810 Open source
#include <bits/stdc++.h>
using namespace std;
# define ull unsigned long long
# define hurryup ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
# define endl '\n'
# define pb push_back
# define INF 1e10
# define vbol vector<bool>
# define vint vector<int>
# define ll long long
# define mod 1000000007
const int up = 202;
int dp[2][up][up][up];
int main()
{
int n,cs,cf;
cin>>n>>cs>>cf;
dp[0][2][1][2] = 1;
dp[1][2][2][1] = 1;
for(int i=3;i<=n;i++)
{
for(int l = 1;l<=n;l++)
{
for(int j =1;j<=n;j++)
{
if(l == j)continue;
for(int k=l;k<i;k++)
{
dp[0][i][l][j] += dp[1][i - 1][k][j - (j >= k?1:0)];
dp[0][i][l][j]%=mod;
}
for(int k=1;k<l;k++)
{
dp[1][i][l][j] += dp[0][i -1][k][ j - (j>= k?1:0)];
dp[1][i][l][j] %= mod;
}
}
}
}
cout << (dp[0][n][cs][cf] + dp[1][n][cs][cf]) % mod <<endl;
}
