#include using namespace std; typedef long long ll; #define F first #define S second #define pii pair #define eb emplace_back #define all(v) v.begin(), v.end() #define rep(i, n) for (int i = 0; i < n; ++i) #define rep3(i, l, n) for (int i = l; i < n; ++i) #define chmax(a, b) a = (a >= b ? a : b) #define chmin(a, b) a = (a <= b ? a : b) #define out(a) cout << a << endl #define outa(a, n) rep(_, n) cout << a[_] << " "; cout << endl #define SZ(v) (int)v.size() #define inf (int)(1e9+7) #define abs(x) (x >= 0 ? x : -(x)) #define ceil(a, b) a / b + !!(a % b) template T gcd(T a, T b) { if (a < b) swap(a, b); if (b == 0) return a; return gcd(b, a % b); } // 解説ac int main() { ios::sync_with_stdio(false); cin.tie(0); ll a, b; cin >> a >> b; ll g = gcd(a, b); out(g * gcd(a / g + b / g, g)); } /* a'+b'、a'b'は互いに素 1. 片方が偶数 a'+b' = 奇数 a'b' = 偶数 2. 両方奇数 a'+b' = 偶数 a'b' = 奇数 */