結果

問題 No.1325 Subsequence Score
ユーザー ningenMe
提出日時 2020-12-24 01:55:57
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 175 ms / 2,000 ms
コード長 6,401 bytes
コンパイル時間 2,202 ms
コンパイル使用メモリ 202,540 KB
最終ジャッジ日時 2025-01-17 06:36:36
ジャッジサーバーID
(参考情報)
judge2 / judge4
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 28
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define ALL(obj) (obj).begin(),(obj).end()
template<class T> using priority_queue_reverse = priority_queue<T,vector<T>,greater<T>>;
constexpr long long MOD = 1'000'000'000LL + 7; //'
constexpr long long MOD2 = 998244353;
constexpr long long HIGHINF = (long long)1e18;
constexpr long long LOWINF = (long long)1e15;
constexpr long double PI = 3.1415926535897932384626433L;
template <class T> vector<T> multivector(size_t N,T init){return vector<T>(N,init);}
template <class... T> auto multivector(size_t N,T... t){return vector<decltype(multivector(t...))>(N,multivector(t...));}
template <class T> void corner(bool flg, T hoge) {if (flg) {cout << hoge << endl; exit(0);}}
template <class T, class U>ostream &operator<<(ostream &o, const map<T, U>&obj) {o << "{"; for (auto &x : obj) o << " {" << x.first << " : " << x
    .second << "}" << ","; o << " }"; return o;}
template <class T>ostream &operator<<(ostream &o, const set<T>&obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr) o << (itr != obj
    .begin() ? ", " : "") << *itr; o << "}"; return o;}
template <class T>ostream &operator<<(ostream &o, const multiset<T>&obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr) o << (itr !
    = obj.begin() ? ", " : "") << *itr; o << "}"; return o;}
template <class T>ostream &operator<<(ostream &o, const vector<T>&obj) {o << "{"; for (int i = 0; i < (int)obj.size(); ++i)o << (i > 0 ? ", " : "")
    << obj[i]; o << "}"; return o;}
template <class T, class U>ostream &operator<<(ostream &o, const pair<T, U>&obj) {o << "{" << obj.first << ", " << obj.second << "}"; return o;}
void print(void) {cout << endl;}
template <class Head> void print(Head&& head) {cout << head;print();}
template <class Head, class... Tail> void print(Head&& head, Tail&&... tail) {cout << head << " ";print(forward<Tail>(tail)...);}
template <class T> void chmax(T& a, const T b){a=max(a,b);}
template <class T> void chmin(T& a, const T b){a=min(a,b);}
vector<string> split(const string &str, const char delemiter) {vector<string> res;stringstream ss(str);string buffer; while( getline(ss, buffer,
    delemiter) ) res.push_back(buffer); return res;}
int msb(int x) {return x?31-__builtin_clz(x):-1;}
void YN(bool flg) {cout << (flg ? "YES" : "NO") << endl;}
void Yn(bool flg) {cout << (flg ? "Yes" : "No") << endl;}
void yn(bool flg) {cout << (flg ? "yes" : "no") << endl;}
/*
* @title CombinationMod - mod
* @docs md/math/CombinationMod.md
*/
template<long long mod> class CombinationMod {
vector<long long> fac,finv,inv;
public:
CombinationMod(int N) : fac(N + 1), finv(N + 1), inv(N + 1) {
fac[0] = fac[1] = finv[0] = finv[1] = inv[1] = 1;
for (int i = 2; i <= N; ++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;
}
}
inline long long binom(int n, int k) {
return ((n < 0 || k < 0 || n < k) ? 0 : fac[n] * (finv[k] * finv[n - k] % mod) % mod);
}
inline long long factorial(int n) {
return fac[n];
}
};
/*
* @title ModInt
* @docs md/util/ModInt.md
*/
template<long long mod> class ModInt {
public:
long long x;
constexpr ModInt():x(0) {}
constexpr ModInt(long long 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 long long y) {ModInt p(y);if((x += p.x) >= mod) x -= mod;return *this;}
ModInt &operator+=(const int y) {ModInt p(y);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 long long y) {ModInt p(y);if((x += mod - p.x) >= mod) x -= mod;return *this;}
ModInt &operator-=(const int y) {ModInt p(y);if((x += mod - p.x) >= mod) x -= mod;return *this;}
ModInt &operator*=(const ModInt &p) {x = (x * p.x % mod);return *this;}
ModInt &operator*=(const long long y) {ModInt p(y);x = (x * p.x % mod);return *this;}
ModInt &operator*=(const int y) {ModInt p(y);x = (x * p.x % mod);return *this;}
ModInt &operator^=(const ModInt &p) {x = (x ^ p.x) % mod;return *this;}
ModInt &operator^=(const long long y) {ModInt p(y);x = (x ^ p.x) % mod;return *this;}
ModInt &operator^=(const int y) {ModInt p(y);x = (x ^ p.x) % mod;return *this;}
ModInt &operator/=(const ModInt &p) {*this *= p.inv();return *this;}
ModInt &operator/=(const long long y) {ModInt p(y);*this *= p.inv();return *this;}
ModInt &operator/=(const int y) {ModInt p(y);*this *= p.inv();return *this;}
ModInt operator=(const int y) {ModInt p(y);*this = p;return *this;}
ModInt operator=(const long long y) {ModInt p(y);*this = p;return *this;}
ModInt operator-() const {return ModInt(-x); }
ModInt operator++() {x++;if(x>=mod) x-=mod;return *this;}
ModInt operator--() {x--;if(x<0) x+=mod;return *this;}
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; }
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 inv() 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(long long n) const {ModInt ret(1), mul(x);for(;n > 0;mul *= mul,n >>= 1) if(n & 1) ret *= mul;return ret;}
friend ostream &operator<<(ostream &os, const ModInt &p) {return os << p.x;}
friend istream &operator>>(istream &is, ModInt &a) {long long t;is >> t;a = ModInt<mod>(t);return (is);}
};
using modint = ModInt<MOD2>;
//verify https://atcoder.jp/contests/abc021/tasks/abc021_d
/**
* @url
* @est
*/
int main() {
cin.tie(0);ios::sync_with_stdio(false);
int N; cin >> N;
CombinationMod<MOD2> CM(N);
modint ans = 0;
{
int a; cin >> a;
ans += modint(2).pow(N-1)*a;
}
for(int i=1;i<N;++i) {
int a; cin >> a;
ans += modint(2).pow(N-(i+1))*modint(2).pow(i-1)*(i+2)*a;
}
cout << ans << endl;
return 0;
}
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