#include <iostream>
#include <iomanip>
#include <cstdio>
#include <string>
#include <cstring>
#include <cstdlib>
#include <cmath>
#include <utility>
#include <locale>
#include <algorithm>
#include <vector>
#include <queue>
#include <stack>
#include <list>
#include <set>
#include <climits>
#include <cfloat>
#define PI acos(0.0) * 2.0
using namespace std;
int main() // Problem G. Great Pow!
{
int a, k;
scanf("%d %d", &a, &k);
if(k==0) printf("%d\n", a);
else
{
if(a%2==0) printf("1\n");
else printf("%d\n", a);
}
return 0;
}
