#include<iostream> #include<string> #include<iomanip> #include<cmath> #include<vector> #include<algorithm> using namespace std; #define int long long #define rep(i,n) for(int i = 0; i < (n); i++) #define INF ((long long)1e18) #define MOD ((int)1e9+7) #define endl "\n" #define yn(f) ((f)?"Yes":"No") #define YN(f) ((f)?"YES":"NO") #define MAX 100 signed main(){ cin.tie(0); ios::sync_with_stdio(false); cout<<fixed<<setprecision(10); int N, K; cin>>N>>K; if(N < K){ cout<<"INF"<<endl; } else { int t = 1, ans = 0; for(int n = N; n;t <<= 1, n >>= 1); // cout<<t<<endl; for(int i = N; i < t; i++){ for(int j = i; j - i <= K; j++){ if((j&i) == N) ans++; } } cout<<ans<<endl; } return 0; }