/*
TASK:lab101
LANG:C++
*/
#include<cstdio>
#include<algorithm>
#include<vector>
#include<queue>

using namespace std;
int n, m;
void vhod()
{
     scanf("%d%d",&n,&m);
     printf("%d",(n+m)%3);
}
int main()
{
    vhod();
    return 0;
}
