#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include using namespace std; #define ll long long #define ld long double #define EPS 0.0000000001 #define INF 1e9 #define LINF (ll)INF*INF #define MOD 1000000007 #define rep(i,n) for(int i=0;i<(n);i++) #define loop(i,a,n) for(int i=a;i<(n);i++) #define all(in) in.begin(),in.end() #define shosu(x) fixed< vi; typedef vector vs; typedef pair pii; typedef vector vp; int gcd(int a, int b){ if(b==0) return a; return gcd(b,a%b); } int lcm(int a, int b){ return a*b/gcd(a,b); } pii f(int i, int j){ int a = 1000*i/(i+j)+5; int b = 1000*j/(i+j)+5; return pii(a/10,b/10); } signed main(void) { int i,j; int a,b; cin >> a >> b; int ans = INF; rep(i,1001)rep(j,1001)if(i||j){ pii x = f(i,j); if(x.first == a && x.second == b){ ans = min(ans,i+j); } } cout << ans << endl; }