結果
問題 | No.2164 Equal Balls |
ユーザー | ぷら |
提出日時 | 2022-12-15 04:29:39 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 4,856 bytes |
コンパイル時間 | 2,608 ms |
コンパイル使用メモリ | 213,644 KB |
実行使用メモリ | 23,072 KB |
最終ジャッジ日時 | 2024-04-26 07:48:54 |
合計ジャッジ時間 | 10,381 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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テストケース
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ソースコード
#include <bits/stdc++.h> using namespace std; constexpr int mod = 998244353; template< int mod > struct NumberTheoreticTransform { vector< int > rev, rts; int base, max_base, root; NumberTheoreticTransform() : base(1), rev{0, 1}, rts{0, 1} { assert(mod >= 3 && mod % 2 == 1); auto tmp = mod - 1; max_base = 0; while(tmp % 2 == 0) tmp >>= 1, max_base++; root = 2; while(mod_pow(root, (mod - 1) >> 1) == 1) ++root; assert(mod_pow(root, mod - 1) == 1); root = mod_pow(root, (mod - 1) >> max_base); } inline int mod_pow(int x, int n) { int ret = 1; while(n > 0) { if(n & 1) ret = mul(ret, x); x = mul(x, x); n >>= 1; } return ret; } inline int inverse(int x) { return mod_pow(x, mod - 2); } inline unsigned add(unsigned x, unsigned y) { x += y; if(x >= mod) x -= mod; return x; } inline unsigned mul(unsigned a, unsigned b) { return 1ull * a * b % (unsigned long long) mod; } void ensure_base(int nbase) { if(nbase <= base) return; rev.resize(1 << nbase); rts.resize(1 << nbase); for(int i = 0; i < (1 << nbase); i++) { rev[i] = (rev[i >> 1] >> 1) + ((i & 1) << (nbase - 1)); } assert(nbase <= max_base); while(base < nbase) { int z = mod_pow(root, 1 << (max_base - 1 - base)); for(int i = 1 << (base - 1); i < (1 << base); i++) { rts[i << 1] = rts[i]; rts[(i << 1) + 1] = mul(rts[i], z); } ++base; } } void ntt(vector< int > &a) { const int n = (int) a.size(); assert((n & (n - 1)) == 0); int zeros = __builtin_ctz(n); ensure_base(zeros); int shift = base - zeros; for(int i = 0; i < n; i++) { if(i < (rev[i] >> shift)) { swap(a[i], a[rev[i] >> shift]); } } for(int k = 1; k < n; k <<= 1) { for(int i = 0; i < n; i += 2 * k) { for(int j = 0; j < k; j++) { int z = mul(a[i + j + k], rts[j + k]); a[i + j + k] = add(a[i + j], mod - z); a[i + j] = add(a[i + j], z); } } } } vector< int > multiply(vector< int > a, vector< int > b) { int need = a.size() + b.size() - 1; int nbase = 1; while((1 << nbase) < need) nbase++; ensure_base(nbase); int sz = 1 << nbase; a.resize(sz, 0); b.resize(sz, 0); ntt(a); ntt(b); int inv_sz = inverse(sz); for(int i = 0; i < sz; i++) { a[i] = mul(a[i], mul(b[i], inv_sz)); } reverse(a.begin() + 1, a.end()); ntt(a); a.resize(need); return a; } }; long long fac[200005], finv[200005], inv[200005]; void COMinit() { fac[0] = fac[1] = finv[0] = finv[1] = inv[1] = 1; for (int i = 2; i < 200005; i++) { fac[i] = fac[i - 1] * i % mod; inv[i] = mod - inv[mod % i] * (mod / i) % mod; finv[i] = finv[i - 1] * inv[i] % mod; } } long long COM(int n, int k){ if (n < k) return 0; if (n < 0 || k < 0) return 0; return fac[n] * (finv[k] * finv[n - k] % mod) % mod; } long long choose(int n,int k) { if(n < 0 || k < 0) return 0; if(n == 0) return 1; return COM(n+k-1,k-1); } int main() { COMinit(); ios::sync_with_stdio(false); cin.tie(nullptr); int N,M; cin >> N >> M; vector<int>A(N),B(N); for(int i = 0; i < N; i++) { cin >> A[i]; } for(int i = 0; i < N; i++) { cin >> B[i]; } vector<vector<int>>dp(M,vector<int>(601,1)); NumberTheoreticTransform<mod>ntt;/* for(int i = 0; i < N; i++) { vector<int>a(A[i]+1),b(B[i]+1); for(int j = 0; j <= A[i]; j++) { a[j] = COM(A[i],j); } for(int j = 0; j <= B[i]; j++) { b[j] = COM(B[i],j); } reverse(b.begin(),b.end()); vector<int>c = ntt.multiply(a,b); vector<int>d(601); for(int j = 0; j <= A[i]+B[i]; j++) { d[300+j-B[i]] = c[j]; } for(int j = 0; j <= 600; j++) { dp[i%M][j] = 1ll*dp[i%M][j]*d[j]%mod; } }*/ vector<int>id(M); iota(id.begin(),id.end(),0); while(id.size() > 1) { vector<int>nxt; for(int i = 0; i+1 < id.size(); i += 2) { dp[id[i]] = ntt.multiply(dp[id[i]],dp[id[i+1]]); nxt.push_back(id[i]); } if(id.size()%2) { nxt.push_back(id.back()); } id = nxt; } cout << dp[id[0]][300*M] << endl; }