結果
問題 | No.1239 Multiplication -2 |
ユーザー | hitonanode |
提出日時 | 2020-10-03 14:43:04 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 16 ms / 2,000 ms |
コード長 | 5,329 bytes |
コンパイル時間 | 1,682 ms |
コンパイル使用メモリ | 201,992 KB |
実行使用メモリ | 6,944 KB |
最終ジャッジ日時 | 2024-07-18 04:26:30 |
合計ジャッジ時間 | 3,336 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge1 |
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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
6,812 KB |
testcase_01 | AC | 1 ms
6,944 KB |
testcase_02 | AC | 2 ms
6,940 KB |
testcase_03 | AC | 1 ms
6,940 KB |
testcase_04 | AC | 2 ms
6,944 KB |
testcase_05 | AC | 2 ms
6,940 KB |
testcase_06 | AC | 1 ms
6,940 KB |
testcase_07 | AC | 2 ms
6,940 KB |
testcase_08 | AC | 2 ms
6,944 KB |
testcase_09 | AC | 2 ms
6,944 KB |
testcase_10 | AC | 2 ms
6,940 KB |
testcase_11 | AC | 2 ms
6,940 KB |
testcase_12 | AC | 2 ms
6,944 KB |
testcase_13 | AC | 1 ms
6,940 KB |
testcase_14 | AC | 1 ms
6,944 KB |
testcase_15 | AC | 6 ms
6,940 KB |
testcase_16 | AC | 10 ms
6,940 KB |
testcase_17 | AC | 13 ms
6,940 KB |
testcase_18 | AC | 13 ms
6,944 KB |
testcase_19 | AC | 15 ms
6,944 KB |
testcase_20 | AC | 16 ms
6,944 KB |
testcase_21 | AC | 13 ms
6,940 KB |
testcase_22 | AC | 13 ms
6,944 KB |
testcase_23 | AC | 11 ms
6,944 KB |
testcase_24 | AC | 11 ms
6,940 KB |
testcase_25 | AC | 8 ms
6,940 KB |
testcase_26 | AC | 10 ms
6,940 KB |
testcase_27 | AC | 5 ms
6,940 KB |
testcase_28 | AC | 14 ms
6,944 KB |
testcase_29 | AC | 14 ms
6,940 KB |
testcase_30 | AC | 7 ms
6,944 KB |
testcase_31 | AC | 10 ms
6,944 KB |
testcase_32 | AC | 16 ms
6,940 KB |
testcase_33 | AC | 12 ms
6,940 KB |
testcase_34 | AC | 11 ms
6,944 KB |
testcase_35 | AC | 6 ms
6,940 KB |
testcase_36 | AC | 6 ms
6,940 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; using lint = long long; using pint = pair<int, int>; using plint = pair<lint, lint>; struct fast_ios { fast_ios(){ cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(20); }; } fast_ios_; #define ALL(x) (x).begin(), (x).end() #define FOR(i, begin, end) for(int i=(begin),i##_end_=(end);i<i##_end_;i++) #define IFOR(i, begin, end) for(int i=(end)-1,i##_begin_=(begin);i>=i##_begin_;i--) #define REP(i, n) FOR(i,0,n) #define IREP(i, n) IFOR(i,0,n) template <typename T> void ndarray(vector<T> &vec, int len) { vec.resize(len); } template <typename T, typename... Args> void ndarray(vector<T> &vec, int len, Args... args) { vec.resize(len); for (auto &v : vec) ndarray(v, args...); } template <typename V, typename T> void ndfill(V &x, const T &val) { x = val; } template <typename V, typename T> void ndfill(vector<V> &vec, const T &val) { for (auto &v : vec) ndfill(v, val); } template <typename T> bool chmax(T &m, const T q) { if (m < q) {m = q; return true;} else return false; } template <typename T> bool chmin(T &m, const T q) { if (m > q) {m = q; return true;} else return false; } template <typename T1, typename T2> pair<T1, T2> operator+(const pair<T1, T2> &l, const pair<T1, T2> &r) { return make_pair(l.first + r.first, l.second + r.second); } template <typename T1, typename T2> pair<T1, T2> operator-(const pair<T1, T2> &l, const pair<T1, T2> &r) { return make_pair(l.first - r.first, l.second - r.second); } template <typename T> vector<T> srtunq(vector<T> vec) { sort(vec.begin(), vec.end()), vec.erase(unique(vec.begin(), vec.end()), vec.end()); return vec; } template <typename T> istream &operator>>(istream &is, vector<T> &vec) { for (auto &v : vec) is >> v; return is; } template <typename T> ostream &operator<<(ostream &os, const vector<T> &vec) { os << '['; for (auto v : vec) os << v << ','; os << ']'; return os; } #if __cplusplus >= 201703L template <typename... T> istream &operator>>(istream &is, tuple<T...> &tpl) { std::apply([&is](auto &&... args) { ((is >> args), ...);}, tpl); return is; } template <typename... T> ostream &operator<<(ostream &os, const tuple<T...> &tpl) { std::apply([&os](auto &&... args) { ((os << args << ','), ...);}, tpl); return os; } #endif template <typename T> ostream &operator<<(ostream &os, const deque<T> &vec) { os << "deq["; for (auto v : vec) os << v << ','; os << ']'; return os; } template <typename T> ostream &operator<<(ostream &os, const set<T> &vec) { os << '{'; for (auto v : vec) os << v << ','; os << '}'; return os; } template <typename T> ostream &operator<<(ostream &os, const unordered_set<T> &vec) { os << '{'; for (auto v : vec) os << v << ','; os << '}'; return os; } template <typename T> ostream &operator<<(ostream &os, const multiset<T> &vec) { os << '{'; for (auto v : vec) os << v << ','; os << '}'; return os; } template <typename T> ostream &operator<<(ostream &os, const unordered_multiset<T> &vec) { os << '{'; for (auto v : vec) os << v << ','; os << '}'; return os; } template <typename T1, typename T2> ostream &operator<<(ostream &os, const pair<T1, T2> &pa) { os << '(' << pa.first << ',' << pa.second << ')'; return os; } template <typename TK, typename TV> ostream &operator<<(ostream &os, const map<TK, TV> &mp) { os << '{'; for (auto v : mp) os << v.first << "=>" << v.second << ','; os << '}'; return os; } template <typename TK, typename TV> ostream &operator<<(ostream &os, const unordered_map<TK, TV> &mp) { os << '{'; for (auto v : mp) os << v.first << "=>" << v.second << ','; os << '}'; return os; } #ifdef HITONANODE_LOCAL #define dbg(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ") " << __FILE__ << endl #else #define dbg(x) #endif template <int mod> struct ModInt { using lint = long long; int val; constexpr ModInt() : val(0) {} constexpr ModInt &_setval(lint v) { val = (v >= mod ? v - mod : v); return *this; } constexpr ModInt(lint v) { _setval(v % mod + mod); } constexpr ModInt operator+(const ModInt &x) const { return ModInt()._setval((lint)val + x.val); } constexpr ModInt operator*(const ModInt &x) const { return ModInt()._setval((lint)val * x.val % mod); } constexpr ModInt &operator+=(const ModInt &x) { return *this = *this + x; } constexpr ModInt &operator*=(const ModInt &x) { return *this = *this * x; } friend constexpr ModInt operator+(lint a, const ModInt &x) { return ModInt()._setval(a % mod + x.val); } friend constexpr ModInt operator*(lint a, const ModInt &x) { return ModInt()._setval(a % mod * x.val % mod); } }; constexpr int MOD = 998244353; using mint = ModInt<MOD>; int main() { int N; cin >> N; mint arr[5]; REP(d, 5) arr[d] = 0; auto dp = arr + 2; mint ret = 0; mint inv2 = (MOD + 1) / 2; REP(i, N) { int a; cin >> a; FOR(d, -2, 3) dp[d] *= inv2; if (a < 0) { swap(dp[-2], dp[2]); swap(dp[-1], dp[1]); } if (a == 0) { dp[-2] = dp[-1] = dp[0] = dp[1] = dp[2] = 0; } if (abs(a) == 2) { dp[-2] = dp[-1], dp[2] = dp[1], dp[-1] = dp[1] = 0; } dp[a] += (i == 0 ? mint(1) : inv2); ret += (i == N - 1 ? mint(1) : inv2) * dp[-2]; } cout << ret.val << '\n'; }