#include <bits/stdc++.h>
#define rep(i, a, n) for(int i = a; i < n; i++)
#define int long long
using namespace std;
typedef pair<int, int> P;
const int mod = 1000000007;
const int INF = 1e18;

signed main(){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    int n, k;
    cin >> n >> k;
    int msbn = 64 - __builtin_clzll(n);
    int ans = 0;
    for(int i = 0; i < (1LL << msbn); i++){
        for(int j = i; j <= i + k; j++){
            int msbj = 64 - __builtin_clzll(j);
            if((i & j) == n){
                ans++;
                if(msbj > msbn){
                    cout << "INF" << endl;
                    return 0;
                }
            }
        }
    }
    cout << ans << endl;
}