#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
     
    int m,n;
    cin>>m>>n;
    int count=0;
    while(m!=1)
        {count++;
         m--;
        }
    while(n!=1)
        {
        count++;
        n--;
    }
    cout<<count;
    return 0;
}