#include <iostream>
#include <utility>
#include <tuple>
#include <vector>
#include <string>
#include <map>
#include <unordered_map>
#include <set>
#include <unordered_set>
#include <algorithm>
#include <functional>
#include <climits>
#include <numeric>
#include <queue>
#include <cmath>
#include <iomanip>
#include <array>
#include <string>
#include <stack>
#include <cassert>
#include <memory>
#include <random>
#include <fstream>
#include <cfloat>
#include <complex>

constexpr long long int MOD{ 998244353 };
int main() {
	int n, m; std::cin >> n >> m;
	std::vector<long long int> factorial(m + 1, 1), div(m + 1, 1), inv(m + 1, 1);
	for (auto i = 2; i <= m; ++i) {
		factorial[i] = i * factorial[i - 1] % MOD;
		div[i] = (MOD - MOD / i) * div[MOD % i] % MOD;
		inv[i] = div[i] * inv[i - 1] % MOD;
	}
	const auto combination = [&factorial, &inv](const int n, const int r) {return factorial[n] * inv[r] % MOD * inv[n - r] % MOD; };
	if (n > m || n == 1) {
		std::cout << "1\n"; return 0;
	}
	else {
		long long int result{ 0 };
		for (auto i = 0; i <= m / n; ++i) {
			const auto j = m - i * n;
			const auto pattern = combination(i + j, i);
			result = (result + pattern) % MOD;
		}
		std::cout << result << '\n';
	}
}