from math import comb, perm


def main():
    N, M = map(int, input().split())
    minimum = M // N
    plus1_number = M % N

    patterns = 1
    current_sum = M
    for _ in range(plus1_number):
        patterns *= comb(current_sum, minimum+1)
        current_sum -= minimum+1
    patterns %= 998244353

    for _ in range(N-plus1_number):
        patterns *= comb(current_sum, minimum)
        current_sum -= minimum
    assert current_sum == 0

    patterns %= 998244353

    print(patterns)


if __name__ == "__main__":
    main()