#include using namespace std; typedef long long ll; const int MAX = 1000010; const int mod = 1000000007; long long fac[MAX], finv[MAX], inv[MAX]; // テーブルを作る前処理 void COMinit() { fac[0] = fac[1] = 1; finv[0] = finv[1] = 1; inv[1] = 1; for (int i = 2; i < MAX; i++){ fac[i] = fac[i - 1] * i % mod; inv[i] = mod - inv[mod%i] * (mod / i) % mod; finv[i] = finv[i - 1] * inv[i] % mod; } } // 二項係数計算 long long COM(int n, int k){ if (n < k) return 0; if (n < 0 || k < 0) return 0; return fac[n] * (finv[k] * finv[n - k] % mod) % mod; } long long gcd(long long a, long long b){ if(b==0) return a; return gcd(b,a%b); } signed main(){ ios::sync_with_stdio(false); cin.tie(0); cout << fixed << setprecision(20); ll n,k; cin>>n>>k; ll dp[n]={}; ll g = gcd(n,k); if(n==k){ cout << 1 << endl; return 0; } COMinit(); for(int i=1;i=2;i--){ if(dp[i]==0) continue; //cerr << i<<" " << dp[i]<