#include<iostream>

 #include<algorithm>

 #include<string>

 #include<cstring>

 using namespace std;

 int n, m;

 int d[][];

 int dp(int i, int j)

 {

     int& ans = d[i][j];

     if (ans != -)  return ans;

     if (i == )    return ans=j - ;

     if (j == )    return ans=i - ;

     if (i %  == )      ans =  * dp(i / , j) + ;

     else if (j %  == ) ans =  * dp(i, j / ) + ;

     else return ans = dp(i - , j) + j;

 }

 int main()

 {

     ios::sync_with_stdio(false);

     //freopen("D:\\txt.txt", "r", stdin);

     while (cin >> n >> m)

     {

         memset(d, -, sizeof(d));

         dp(n, m);

         cout << d[n][m] << endl;

     }

 }

 #include<iostream>

 #include<algorithm>

 #include<string>

 #include<cstring>

 using namespace std;

 int n, m;

 int main()

 {

     ios::sync_with_stdio(false);

     //freopen("D:\\txt.txt", "r", stdin);

     while (cin >> n >> m)

     {

         cout << m*n -  << endl;

     }

 }