#include <bits/stdc++.h>
using namespace std;
const int MOD = 1e9 + 7;
int DPplusfirst[205][205];
int DPplussecond[205][205];
int DPminusfirst[205][205];
int DPminussecond[205][205];
void cpy(){
for (int i = 0; i < 205; i++){
for (int j = 0; j < 205; j++){
DPplusfirst[i][j] = DPplussecond[i][j];
DPminusfirst[i][j] = DPminussecond[i][j];
}
}
}
int main(){
int N, cs, cf; cin >> N >> cs >> cf;
DPplussecond[1][2] = 1LL;
DPminussecond[2][1] = 1LL;
for (int i = 3; i <= N; i++){
cpy();
for (int k = 1; k <= i; k++){
bool vis[2];
vis[0] = false;
vis[1] = false;
for (int j = 1; j <= i; j++){
if (k == j) continue;
DPplussecond[j][k] = 0LL;
DPminussecond[j][k] = 0LL;
int eps = (k > j);
if (vis[eps]){
DPminussecond[j][k] = DPminussecond[j-1][k] + DPplusfirst[j-1][k-eps];
DPminussecond[j][k] %= MOD;
DPplussecond[j][k] = DPplussecond[j-1][k] + (MOD - DPminusfirst[j-1][k-eps]);
DPplussecond[j][k] %= MOD;
}
else{
vis[eps] = true;
for (int l = 1; l <= j - 1; l++){
DPminussecond[j][k] += DPplusfirst[l][k - eps];
DPminussecond[j][k] %= MOD;
}
for (int l = j + 1; l <= i; l++){
DPplussecond[j][k] += DPminusfirst[l - 1][k - eps];
DPplussecond[j][k] %= MOD;
}
}
}
}
}
cout << (DPplussecond[cs][cf] + DPminussecond[cs][cf]) % MOD << endl;
}
