#include #include using namespace std; using mint = atcoder::modint998244353; const int CombMAX = 3000000; std::vector fac(CombMAX + 1), finv(CombMAX + 1), inv(CombMAX + 1); struct Combinationinit { Combinationinit() { const int MOD = mint::mod(); fac[0] = fac[1] = 1; finv[0] = finv[1] = 1; inv[1] = 1; for(int i = 2; i <= CombMAX; i++) { fac[i] = fac[i - 1] * i; inv[i] = (mint)MOD - inv[MOD % i] * (MOD / i); finv[i] = finv[i - 1] * inv[i]; } } } Combinationinit_; mint fast_mod_factorial(long long n) { if(n >= mint::mod()) return 0; const int d = 1 << 15; std::vector seq({1, d + 1}); seq.reserve(d + 1); int sz = 1; while(sz < d) { std::vector aux(sz, 1), f(sz * 4), g(sz * 4); for(int i = 0; i <= sz; i++) { f[i] = finv[i] * finv[sz - i] * seq[i]; if((sz + i & 1) and f[i] != 0) f[i] *= -1; } std::vector pf(f), as; as.emplace_back(sz + 1); as.emplace_back(mint(sz) / d); as.emplace_back(mint(sz) / d + sz + 1); for(int idx = 0; idx < 3; idx++) { for(int i = 0; i < sz * 4; i++) f[i] = pf[i]; for(int i = 1; i < sz * 2 + 2; i++) g[i] = (as[idx] - (sz - i + 1)).inv(); f = atcoder::convolution(f, g); f.resize(sz * 4); mint prod = 1; for(int i = 0; i <= sz; i++) prod *= as[idx] - i; for(int i = 0; i <= sz; i++) { f[sz + i + 1] *= prod; prod *= as[idx] + i + 1; prod /= as[idx] - (sz - i); } if(idx == 0) for(int i = 0; i < sz; i++) aux[i] = f[sz + i + 1]; if(idx == 1) for(int i = 0; i <= sz; i++) seq[i] *= f[sz + i + 1]; if(idx == 2) for(int i = 0; i < sz; i++) aux[i] *= f[sz + i + 1]; } for(auto x : aux) seq.emplace_back(x); sz <<= 1; } mint res = 1; int l = min((long long)d, (n + 1) / d); for(int i = 0; i < l; i++) res *= seq[i]; for(int i = l * d + 1; i <= n; i++) res *= i; return res; } int sum_pality; int main() { int n, m; cin >> n >> m; const int s = m * (m - 1) / 2; //s_fac[0] = s!, s_fac[1] = (s-1)!,..,s_fac[n] = (s-n)! mint fac_s = 1; vector s_fac(n + 1), s_finv(n + 1); auto s_fac_init = [&]() { if(s <= 1000000) { fac_s = fac[s]; for(int i = 0; i <= n; i++) { if(s - i < 0) s_finv[i] = 0; s_finv[i] = finv[s - i]; } return; } else { fac_s = fast_mod_factorial(s); s_finv[0] = fac_s.inv(); for(int i = 0; i < n; i++) s_finv[i + 1] = s_finv[i] * (s - i); return; } }; vector even_even, even_odd, odd_odd; auto convolution_init = [&]() { vector odd(n + 1), even(n + 1); for(int i = 0; i < n + 1 and s - i >= 0; i++) { if(i % 2) odd[i] = finv[i] * s_finv[i]; else even[i] = finv[i] * s_finv[i]; } even_even = atcoder::convolution(even, even); even_odd = atcoder::convolution(even, odd); odd_odd = atcoder::convolution(odd, odd); }; vector quadratic_residue(m); auto quadratic_residue_init = [&]() { for(int i = 1; i < m; i++) quadratic_residue[(long long)i * i % m] = 1; }; s_fac_init(); convolution_init(); quadratic_residue_init(); vector b(n), c(n); auto decode_inversion = [&](int b, int c) { if(m == 2) return b == 1; return !quadratic_residue[c]; }; auto solver = [&](int k) -> mint { if(k == 1) return 1; if(k == 2) { if(b[0] == b[1] and c[0] == c[1]) return 0; return m * (m - 1); } if(k % 2) { return even_odd[k] * fac[k] * fac_s * fac_s; } else { if(sum_pality % 2) return odd_odd[k] * fac[k] * fac_s * fac_s; else return even_even[k] * fac[k] * fac_s * fac_s; } }; for(int i = 0; i < n; i++) cin >> b[i] >> c[i]; for(int i = 1; i <= n; i++) { sum_pality += decode_inversion(b[i - 1], c[i - 1]); cout << solver(i).val() << '\n'; } return 0; }