#pragma GCC target("avx2") #pragma GCC optimize("O3") #pragma GCC optimize("unroll-loops") #include #include #include #include #include #include #include #include #include #include #include #include #define debug_value(x) cerr << "line" << __LINE__ << ":<" << __func__ << ">:" << #x << "=" << x << endl; #define debug(x) cerr << "line" << __LINE__ << ":<" << __func__ << ">:" << x << endl; template inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; } template inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; } using namespace std; typedef long long ll; ll dp[205][200500]; vector calc(ll k){ set st; for(ll i = 1; i*i <= k; i++){ st.insert(i); st.insert(k/i); } vector ans; for(ll x: st) ans.push_back(x); return ans; } int main(){ ios::sync_with_stdio(false); cin.tie(0); cout << setprecision(10) << fixed; int n; ll k; cin >> n >> k; auto v = calc(k); int m = v.size(); unordered_map inv = [&](){ unordered_map ans; for(int i = 0; i < m; i++) ans[v[i]] = i; return ans; }(); vector> nx(m, vector(n+1)); // nx[i][j] = v[i]/j for(int i = 0; i < m; i++){ for(int j = 1; j <= n; j++){ ll x = v[i]/j; if(x == 0) nx[i][j] = -1; else nx[i][j] = inv[x]; } } return 0; dp[n][m-1] = 1; for(int i = n; i >= 1; i--){ for(int j = 0; j < m; j++){ dp[i-1][j] += dp[i][j]; int k = nx[j][i]; if(k == -1) continue; dp[i-1][k] += dp[i][j]; } // for(int j = 0; j < m; j++) cout << dp[i-1][j] << ' '; // cout << endl; } ll ans = 0; for(int i = 0; i < m; i++) ans += dp[0][i]; cout << ans-1 << endl; }