#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <algorithm>
#include <string>
#include <cstring>
#include <cmath>
#include <vector>

using namespace std;

int main(void)
{
	int c, i, n;
	cin>>c>>i;
	n = c * (i-1) + 1;
	cout<<n;	
    
     return 0;
}