結果
問題 | No.1239 Multiplication -2 |
ユーザー | ei1333333 |
提出日時 | 2020-09-25 22:41:36 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 4,694 bytes |
コンパイル時間 | 2,335 ms |
コンパイル使用メモリ | 208,896 KB |
実行使用メモリ | 15,076 KB |
最終ジャッジ日時 | 2024-06-28 07:02:58 |
合計ジャッジ時間 | 4,330 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
6,816 KB |
testcase_01 | AC | 2 ms
6,944 KB |
testcase_02 | AC | 2 ms
6,944 KB |
testcase_03 | WA | - |
testcase_04 | WA | - |
testcase_05 | WA | - |
testcase_06 | WA | - |
testcase_07 | WA | - |
testcase_08 | WA | - |
testcase_09 | AC | 2 ms
6,940 KB |
testcase_10 | WA | - |
testcase_11 | AC | 2 ms
6,940 KB |
testcase_12 | AC | 2 ms
6,940 KB |
testcase_13 | AC | 2 ms
6,940 KB |
testcase_14 | AC | 2 ms
6,940 KB |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | AC | 47 ms
14,916 KB |
testcase_18 | AC | 57 ms
15,000 KB |
testcase_19 | AC | 42 ms
14,956 KB |
testcase_20 | WA | - |
testcase_21 | AC | 67 ms
14,720 KB |
testcase_22 | AC | 52 ms
14,228 KB |
testcase_23 | AC | 48 ms
11,440 KB |
testcase_24 | AC | 38 ms
11,068 KB |
testcase_25 | AC | 17 ms
9,996 KB |
testcase_26 | AC | 42 ms
10,496 KB |
testcase_27 | WA | - |
testcase_28 | WA | - |
testcase_29 | WA | - |
testcase_30 | WA | - |
testcase_31 | WA | - |
testcase_32 | WA | - |
testcase_33 | WA | - |
testcase_34 | WA | - |
testcase_35 | WA | - |
testcase_36 | WA | - |
ソースコード
#include <bits/stdc++.h> using namespace std; using int64 = long long; // const int mod = 1e9 + 7; const int mod = 998244353; const int64 infll = (1LL << 62) - 1; const int inf = (1 << 30) - 1; struct IoSetup { IoSetup() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(10); cerr << fixed << setprecision(10); } } iosetup; template< typename T1, typename T2 > ostream &operator<<(ostream &os, const pair< T1, T2 > &p) { os << p.first << " " << p.second; return os; } template< typename T1, typename T2 > istream &operator>>(istream &is, pair< T1, T2 > &p) { is >> p.first >> p.second; return is; } template< typename T > ostream &operator<<(ostream &os, const vector< T > &v) { for(int i = 0; i < (int) v.size(); i++) { os << v[i] << (i + 1 != v.size() ? " " : ""); } return os; } template< typename T > istream &operator>>(istream &is, vector< T > &v) { for(T &in : v) is >> in; return is; } template< typename T1, typename T2 > inline bool chmax(T1 &a, T2 b) { return a < b && (a = b, true); } template< typename T1, typename T2 > inline bool chmin(T1 &a, T2 b) { return a > b && (a = b, true); } template< typename T = int64 > vector< T > make_v(size_t a) { return vector< T >(a); } template< typename T, typename... Ts > auto make_v(size_t a, Ts... ts) { return vector< decltype(make_v< T >(ts...)) >(a, make_v< T >(ts...)); } template< typename T, typename V > typename enable_if< is_class< T >::value == 0 >::type fill_v(T &t, const V &v) { t = v; } template< typename T, typename V > typename enable_if< is_class< T >::value != 0 >::type fill_v(T &t, const V &v) { for(auto &e : t) fill_v(e, v); } template< typename F > struct FixPoint : F { FixPoint(F &&f) : F(forward< F >(f)) {} template< typename... Args > decltype(auto) operator()(Args &&... args) const { return F::operator()(*this, forward< Args >(args)...); } }; template< typename F > inline decltype(auto) MFP(F &&f) { return FixPoint< F >{forward< F >(f)}; } template< int mod > struct ModInt { int x; ModInt() : x(0) {} ModInt(int64_t y) : x(y >= 0 ? y % mod : (mod - (-y) % mod) % mod) {} ModInt &operator+=(const ModInt &p) { if((x += p.x) >= mod) x -= mod; return *this; } ModInt &operator-=(const ModInt &p) { if((x += mod - p.x) >= mod) x -= mod; return *this; } ModInt &operator*=(const ModInt &p) { x = (int) (1LL * x * p.x % mod); return *this; } ModInt &operator/=(const ModInt &p) { *this *= p.inverse(); return *this; } ModInt operator-() const { return ModInt(-x); } ModInt operator+(const ModInt &p) const { return ModInt(*this) += p; } ModInt operator-(const ModInt &p) const { return ModInt(*this) -= p; } ModInt operator*(const ModInt &p) const { return ModInt(*this) *= p; } ModInt operator/(const ModInt &p) const { return ModInt(*this) /= p; } bool operator==(const ModInt &p) const { return x == p.x; } bool operator!=(const ModInt &p) const { return x != p.x; } ModInt inverse() const { int a = x, b = mod, u = 1, v = 0, t; while(b > 0) { t = a / b; swap(a -= t * b, b); swap(u -= t * v, v); } return ModInt(u); } ModInt pow(int64_t n) const { ModInt ret(1), mul(x); while(n > 0) { if(n & 1) ret *= mul; mul *= mul; n >>= 1; } return ret; } friend ostream &operator<<(ostream &os, const ModInt &p) { return os << p.x; } friend istream &operator>>(istream &is, ModInt &a) { int64_t t; is >> t; a = ModInt< mod >(t); return (is); } static int get_mod() { return mod; } }; using modint = ModInt< mod >; int main() { int N; cin >> N; vector< int > A(N); cin >> A; auto dp = make_v< modint >(N, 2); // (-1の個数) mod 2 dp[0][0] = 1; modint ret = 0; for(int i = 0; i < N; i++) { if(abs(A[i]) == 2) { int l = i - 1, r = i + 1; modint Lsum[] = {0, 0}; Lsum[0] += (i <= 1 ? 1 : modint(2).pow(i - 1)); bool f = false; while(l >= 0 && abs(A[l]) == 1) { f ^= A[l] == -1; Lsum[f] += (l <= 1 ? 1 : modint(2).pow(l - 1)); --l; } modint Rsum[] = {0, 0}; Rsum[0] += (i + 2 >= N ? 1 : modint(2).pow(N - i - 2)); f = false; while(r < N && abs(A[r]) == 1) { f ^= A[r] == -1; Rsum[f] += (r + 2 >= N ? 1 : modint(2).pow(N - r - 2)); ++r; } if(A[i] == 2) { ret += Lsum[0] * Rsum[1]; ret += Lsum[0] * Rsum[1]; } else { ret += Lsum[0] * Rsum[0]; ret += Lsum[1] * Rsum[1]; } } } cout << ret / modint(2).pow(N - 1) << "\n"; }