結果
問題 | No.1239 Multiplication -2 |
ユーザー | homesentinel |
提出日時 | 2020-09-26 15:25:12 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 80 ms / 2,000 ms |
コード長 | 6,427 bytes |
コンパイル時間 | 1,271 ms |
コンパイル使用メモリ | 119,648 KB |
実行使用メモリ | 10,240 KB |
最終ジャッジ日時 | 2024-06-29 02:40:36 |
合計ジャッジ時間 | 3,091 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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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
5,248 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | AC | 1 ms
5,376 KB |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | AC | 3 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | AC | 2 ms
5,376 KB |
testcase_07 | AC | 2 ms
5,376 KB |
testcase_08 | AC | 2 ms
5,376 KB |
testcase_09 | AC | 2 ms
5,376 KB |
testcase_10 | AC | 2 ms
5,376 KB |
testcase_11 | AC | 2 ms
5,376 KB |
testcase_12 | AC | 2 ms
5,376 KB |
testcase_13 | AC | 1 ms
5,376 KB |
testcase_14 | AC | 1 ms
5,376 KB |
testcase_15 | AC | 18 ms
5,632 KB |
testcase_16 | AC | 31 ms
6,912 KB |
testcase_17 | AC | 62 ms
10,240 KB |
testcase_18 | AC | 80 ms
10,240 KB |
testcase_19 | AC | 45 ms
10,112 KB |
testcase_20 | AC | 60 ms
10,112 KB |
testcase_21 | AC | 72 ms
10,112 KB |
testcase_22 | AC | 53 ms
9,728 KB |
testcase_23 | AC | 54 ms
8,064 KB |
testcase_24 | AC | 39 ms
7,808 KB |
testcase_25 | AC | 10 ms
7,296 KB |
testcase_26 | AC | 45 ms
7,424 KB |
testcase_27 | AC | 21 ms
5,376 KB |
testcase_28 | AC | 65 ms
9,088 KB |
testcase_29 | AC | 73 ms
9,600 KB |
testcase_30 | AC | 26 ms
6,016 KB |
testcase_31 | AC | 39 ms
7,424 KB |
testcase_32 | AC | 66 ms
10,240 KB |
testcase_33 | AC | 45 ms
8,064 KB |
testcase_34 | AC | 42 ms
7,808 KB |
testcase_35 | AC | 22 ms
5,504 KB |
testcase_36 | AC | 19 ms
5,376 KB |
ソースコード
#include <algorithm> #include <bitset> #include <complex> #include <deque> #include <exception> #include <fstream> #include <functional> #include <iomanip> #include <ios> #include <iosfwd> #include <iostream> #include <istream> #include <iterator> #include <limits> #include <list> #include <locale> #include <map> #include <memory> #include <new> #include <numeric> #include <ostream> #include <queue> #include <set> #include <sstream> #include <stack> #include <stdexcept> #include <streambuf> #include <string> #include <typeinfo> #include <utility> #include <valarray> #include <vector> #include <climits> #include <cstring> #include <cassert> using namespace std; //using namespace atcoder; #define REP(i, n) for (int i=0; i<(n); ++i) #define RREP(i, n) for (int i=(int)(n)-1; i>=0; --i) #define FOR(i, a, n) for (int i=(a); i<(n); ++i) #define RFOR(i, a, n) for (int i=(int)(n)-1; i>=(a); --i) #define SZ(x) ((int)(x).size()) #define ALL(x) (x).begin(),(x).end() #define DUMP(x) cerr<<#x<<" = "<<(x)<<endl #define DEBUG(x) cerr<<#x<<" = "<<(x)<<" (L"<<__LINE__<<")"<<endl; template<class T> ostream &operator<<(ostream &os, const vector<T> &v) { os << "["; REP(i, SZ(v)) { if (i) os << ", "; os << v[i]; } return os << "]"; } template<class T, class U> ostream &operator<<(ostream &os, const pair<T, U> &p) { return os << "(" << p.first << " " << p.second << ")"; } template<class T> bool chmax(T &a, const T &b) { if (a < b) { a = b; return true; } return false; } template<class T> bool chmin(T &a, const T &b) { if (b < a) { a = b; return true; } return false; } using ll = long long; using ull = unsigned long long; using ld = long double; using P = pair<int, int>; using vi = vector<int>; using vll = vector<ll>; using vvi = vector<vi>; using vvll = vector<vll>; const ll MOD = 1e9 + 7; const int INF = INT_MAX / 2; const ll LINF = LLONG_MAX / 2; const ld eps = 1e-9; // edit template<int64_t mod> class modint { int64_t x; public: modint(int64_t x = 0) : x(x < 0 ? ((x % mod) + mod) % mod : x % mod) {} const modint operator-() const { return x ? mod - x : 0; } modint &operator+=(const modint &rhs) { if ((x += rhs.x) >= mod) x -= mod; return *this; } modint &operator-=(const modint &rhs) { return *this += -rhs; } modint &operator*=(const modint &rhs) { (x *= rhs.x) %= mod; return *this; } modint &operator/=(const modint &rhs) { return *this *= rhs.pow(mod - 2); } friend const modint operator+(modint lhs, const modint &rhs) { return lhs += rhs; } friend const modint operator-(modint lhs, const modint &rhs) { return lhs -= rhs; } friend const modint operator*(modint lhs, const modint &rhs) { return lhs *= rhs; } friend const modint operator/(modint lhs, const modint &rhs) { return lhs /= rhs; } const modint pow(int64_t n) const { modint ret = 1, tmp = *this; while (n) { if (n & 1) ret *= tmp; tmp *= tmp; n >>= 1; } return ret; } friend bool operator==(const modint &lhs, const modint &rhs) { return lhs.x == rhs.x; } friend bool operator!=(const modint &lhs, const modint &rhs) { return !(lhs == rhs); } friend ostream &operator<<(ostream &os, const modint &a) { return os << a.x; } friend istream &operator>>(istream &is, modint &a) { int64_t tmp; is >> tmp; a = tmp; return is; } }; using mint = modint<998244353>; void solve() { int N; cin >> N; vector<int> A(N); REP(i, N) cin >> A[i]; vector<mint> Lp(N); vector<mint> Lm(N); vector<mint> Rp(N); vector<mint> Rm(N); { int t = -1; // 前回登場した2or-2のidx int c = 0; // 1 or -1が連続している回数 int s = 1; // 積の符号 for (int i = 0; i < N; ++i) { if (abs(A[i]) == 2) { t = i; c = 0; if (i != N - 1) c++; s = 1; } else if (A[i] == 0) { t = -1; c = 0; s = 1; continue; } else if (abs(A[i]) == 1) { if (i != N - 1) c++; s *= A[i]; } if (t == -1) { continue; } // 伝播 if (s == 1) { mint tmp = mint(2).pow(c); mint inv = 1 / tmp; Rp[t] += inv; } else if (s == -1) { mint tmp = mint(2).pow(c); mint inv = 1 / tmp; Rm[t] += inv; } } } { int t = -1; // 前回登場した2or-2のidx int c = 0; // 1 or -1が連続している回数 int s = 1; // 積の符号 for (int i = N - 1; i >= 0; --i) { if (abs(A[i]) == 2) { t = i; c = 0; if (i != 0) c++; s = 1; } else if (A[i] == 0) { t = -1; c = 0; s = 1; continue; } else if (abs(A[i]) == 1) { if (i != 0) c++; s *= A[i]; } if (t == -1) { continue; } // 伝播 if (s == 1) { mint tmp = mint(2).pow(c); mint inv = 1 / tmp; Lp[t] += inv; } else if (s == -1) { mint tmp = mint(2).pow(c); mint inv = 1 / tmp; Lm[t] += inv; } } } mint ans = 0; for (int i = 0; i < N; ++i) { if (A[i] == 2) { mint tmp = Lm[i] * Rp[i] + Lp[i] * Rm[i]; // tmp *= mint(2).pow(N - 2); ans += tmp; } else if (A[i] == -2) { mint tmp = Lm[i] * Rm[i] + Lp[i] * Rp[i]; // tmp *= mint(2).pow(N - 2); ans += tmp; } } cout << ans << endl; } int main() { cin.tie(0); ios::sync_with_stdio(false); cout << fixed << setprecision(10); // std::ifstream in("input.txt"); // std::cin.rdbuf(in.rdbuf()); solve(); return 0; }