#include <bits/stdc++.h>

using namespace std;
using ll = long long;
// #define int ll
using PII = pair<ll, ll>;

#define FOR(i, a, n) for (ll i = (ll)a; i < (ll)n; ++i)
#define REP(i, n) FOR(i, 0, n)
#define ALL(x) x.begin(), x.end()

template<typename T> T &chmin(T &a, const T &b) { return a = min(a, b); }
template<typename T> T &chmax(T &a, const T &b) { return a = max(a, b); }
template<typename T> bool IN(T a, T b, T x) { return a<=x&&x<b; }
template<typename T> T ceil(T a, T b) { return a/b + !!(a%b); }

template<typename T> vector<T> make_v(size_t a) { return vector<T>(a); }
template<typename T,typename... Ts>
auto make_v(size_t a,Ts... ts) {
    return vector<decltype(make_v<T>(ts...))>(a,make_v<T>(ts...));
}
template<typename T,typename V> typename enable_if<is_class<T>::value==0>::type
fill_v(T &t, const V &v) { t=v; }
template<typename T,typename V> typename enable_if<is_class<T>::value!=0>::type
fill_v(T &t, const V &v ) { for(auto &e:t) fill_v(e,v); }

template<class S,class T>
ostream &operator <<(ostream& out,const pair<S,T>& a){
    out<<'('<<a.first<<','<<a.second<<')'; return out;
}
template<class T>
ostream &operator <<(ostream& out,const vector<T>& a){
    out<<'['; for(T i: a) {out<<i<<',';} out<<']'; return out;
}

int dx[] = {0, 1, 0, -1}, dy[] = {1, 0, -1, 0}; // DRUL
const int INF = 1<<30;
const ll LLINF = 1LL<<60;
const ll MOD = 1000000007;

ll dp[51][100005][2];
signed main(void)
{
    cin.tie(0);
    ios::sync_with_stdio(false);

    ll n, K;
    cin >> n >> K;

    if(n+1 <= K) {
        cout << "INF" << endl;
        return 0;
    }

    ll sz = 50;
    dp[0][0][0] = 1;
    REP(i, sz) REP(j, n+1) REP(k, 2) {
        if(dp[i][j][k] == 0) continue;
        // cout << i << " " << j << " " << k << endl;
        // (0, 0)
        if(!(n&1LL<<(sz-1-i))) {
            // cout << "a" << endl;
            dp[i+1][j][k] += dp[i][j][k];
        }

        // (0, 1)
        if(!(n&1LL<<(sz-1-i)) && (j+(1LL<<(sz-1-i))) <= n) {
            // cout << "b" << endl;
            dp[i+1][j+(1<<(sz-1-i))][1] += dp[i][j][k];
        }

        // (1, 0)
        if(!(n&1LL<<(sz-1-i)) && k==1 && j>=(1LL<<(sz-1-i))) {
            // cout << "c" << endl;
            dp[i+1][j-(1<<(sz-1-i))][k] += dp[i][j][k];
        }

        // (1, 1)
        if(n&1LL<<(sz-1-i)) {
            // cout << "d" << endl;
            dp[i+1][j][k] += dp[i][j][k];
        }
    }

    ll ret = 0;
    REP(i, K+1) ret += dp[sz][i][1] + dp[sz][i][0];
    cout << ret << endl;

    // REP(j, sz+1) {
    //     REP(i, K+1) cout << "(" << dp[j][i][0] << "," << dp[j][i][1] << ") ";
    //     cout << endl;
    // }

    return 0;
}