結果
| 問題 |
No.1681 +-*
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2025-04-12 17:37:28 |
| 言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 28 ms / 2,000 ms |
| コード長 | 6,012 bytes |
| コンパイル時間 | 5,956 ms |
| コンパイル使用メモリ | 311,724 KB |
| 実行使用メモリ | 7,844 KB |
| 最終ジャッジ日時 | 2025-04-12 17:37:36 |
| 合計ジャッジ時間 | 6,914 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 18 |
ソースコード
#include <bits/extc++.h>
#include <bits/stdc++.h>
using namespace std;
using namespace __gnu_pbds;
#define endl '\n'
#define ture true
#define flase false
#define pow power
#define all(x) begin(x), end(x)
#define mem(a, x) memset(a, x, sizeof(a))
#define gcd(a, b) gcdint(a, b)
#define lcm(a, b) (a / gcd(a, b) * b)
#define sz(x) (int)x.size()
#define lowbit(x) (x & -x)
#define time(a, b) (abs((b - a) / CLOCKS_PER_SEC))
// double a = clock();
#define pb push_back
#define EPS 1e-7
#define i128 __int128
#define fr first
#define sc second
#define tcT template <class T
#define tcTU tcT, class U
void unsyncIO() { cin.tie(0)->sync_with_stdio(0); }
void setPrec() { cout << fixed << setprecision(15); }
void setIO() { unsyncIO(), setPrec(); }
inline int gcdint(int a, int b) { return b ? gcdint(b, a % b) : a; }
inline i128 gcd128(i128 a, i128 b) { return b ? gcd128(b, a % b) : a; }
inline int cdiv(int a, int b) { return a / b + ((a ^ b) > 0 && a % b); }
inline int fdiv(int a, int b) { return a / b - ((a ^ b) < 0 && a % b); }
tcT > using V = vector<T>;
tcTU > using PR = pair<T, U>;
tcTU > using MP = map<T, U>;
tcTU > using VP = vector<pair<T, U>>;
tcT > using pql =
__gnu_pbds::priority_queue<T, less<T>, __gnu_pbds::pairing_heap_tag>;
tcT > using pqg =
__gnu_pbds::priority_queue<T, greater<T>, __gnu_pbds::pairing_heap_tag>;
tcTU > istream &operator>>(istream &in, pair<T, U> &a) {
return in >> a.first >> a.second;
}
tcT > istream &operator>>(istream &in, vector<T> &a) {
for (auto &x : a) {
in >> x;
}
return in;
}
tcTU > ostream &operator<<(ostream &out, const pair<T, U> &a) {
return out << a.first << ' ' << a.second;
}
tcTU > ostream &operator<<(ostream &out, const vector<pair<T, U>> &a) {
for (auto &x : a) {
out << x << endl;
}
return out;
}
tcT > ostream &operator<<(ostream &out, const vector<T> &a) {
int n = a.size();
if (!n) {
return out;
}
out << a[0];
for (int i = 1; i < n; i++) {
out << ' ' << a[i];
}
return out;
}
std::ostream &operator<<(std::ostream &os, i128 n) {
std::string s;
while (n) {
s += '0' + n % 10;
n /= 10;
}
std::reverse(s.begin(), s.end());
return os << s;
}
tcT > bool ckmin(T &a, const T &b) { return b < a ? a = b, 1 : 0; }
tcT > bool ckmax(T &a, const T &b) { return a < b ? a = b, 1 : 0; }
tcT > void remDup(vector<T> &v) {
sort(all(v));
v.erase(unique(all(v)), end(v));
}
tcTU > void erase(T &t, const U &u) {
auto it = t.find(u);
assert(it != end(t));
t.erase(it);
}
tcTU > T fstTrue(T lo, T hi, U f) {
hi++;
assert(lo <= hi);
while (lo < hi) {
T mid = lo + (hi - lo) / 2;
f(mid) ? hi = mid : lo = mid + 1;
}
return lo;
}
tcTU > T lstTrue(T lo, T hi, U f) {
lo--;
assert(lo <= hi);
while (lo < hi) {
T mid = lo + (hi - lo + 1) / 2;
f(mid) ? lo = mid : hi = mid - 1;
}
return lo;
}
constexpr int mod = 1e9 + 7;
constexpr int inf = 0x7fffffff;
constexpr int N = 1.01e6;
constexpr int M = 2.01e3;
#ifdef LOCAL
#include <C:/Users/70510/Desktop/Others/algo/debug.h>
#else
#define debug(...) 42
#endif
using i64 = long long;
template <class T>
constexpr T mypow(T n, i64 k) {
T r = 1;
for (; k; k /= 2, n *= n) {
if (k % 2) {
r *= n;
}
}
return r;
}
template <int MOD>
struct Zmod {
int x;
Zmod(int x = 0) : x(norm(x % MOD)) {}
Zmod(i64 x) : x(norm(x % MOD)) {}
constexpr int norm(int x) const {
if (x < 0) {
x += MOD;
}
if (x >= MOD) {
x -= MOD;
}
return x;
}
constexpr int val() const { return x; }
constexpr Zmod operator-() const {
Zmod val = norm(MOD - x);
return val;
}
constexpr Zmod inv() const {
assert(x != 0);
return mypow(*this, MOD - 2);
}
friend constexpr auto &operator>>(istream &in, Zmod &j) {
int v;
in >> v;
j = Zmod(v);
return in;
}
friend constexpr auto &operator<<(ostream &o, const Zmod &j) {
return o << j.val();
}
constexpr Zmod &operator++() {
x = norm(x + 1);
return *this;
}
constexpr Zmod &operator--() {
x = norm(x - 1);
return *this;
}
constexpr Zmod &operator+=(const Zmod &i) {
x = norm(x + i.x);
return *this;
}
constexpr Zmod &operator-=(const Zmod &i) {
x = norm(x - i.x);
return *this;
}
constexpr Zmod &operator*=(const Zmod &i) {
x = i64(x) * i.x % MOD;
return *this;
}
constexpr Zmod &operator/=(const Zmod &i) { return *this *= i.inv(); }
constexpr Zmod &operator%=(const int &i) { return x %= i, *this; }
friend constexpr Zmod operator+(const Zmod i, const Zmod j) {
return Zmod(i) += j;
}
friend constexpr Zmod operator-(const Zmod i, const Zmod j) {
return Zmod(i) -= j;
}
friend constexpr Zmod operator*(const Zmod i, const Zmod j) {
return Zmod(i) *= j;
}
friend constexpr Zmod operator/(const Zmod i, const Zmod j) {
return Zmod(i) /= j;
}
friend constexpr Zmod operator%(const Zmod i, const int j) {
return Zmod(i) %= j;
}
friend constexpr bool operator==(const Zmod i, const Zmod j) {
return i.val() == j.val();
}
friend constexpr bool operator!=(const Zmod i, const Zmod j) {
return i.val() != j.val();
}
friend constexpr bool operator<(const Zmod i, const Zmod j) {
return i.val() < j.val();
}
friend constexpr bool operator>(const Zmod i, const Zmod j) {
return i.val() > j.val();
}
};
constexpr int MOD[] = {998244353, 1000000007};
using Z = Zmod<MOD[1]>;
Z power(int n) { return mypow(Z(2), n); }
void solve() {
int n;
cin >> n;
V<Z> a(n);
cin >> a;
V<Z> pre(n + 1);
pre[0] = Z(1);
for (int i = 1; i <= n; i++) {
pre[i] = pre[i - 1] * a[i - 1];
}
V<Z> pow3(n, 0);
pow3[0] = Z(1);
for (int i = 1; i < n; i++) {
pow3[i] = (pow3[i - 1] * 3);
}
Z ans = pre[n];
for (int i = 1; i < n; i++) {
Z coef = 2 * pow3[n - 1 - i];
ans += coef * pre[i];
}
cout << ans << endl;
}
signed main() {
setIO();
int tt = 1;
// cin >> tt;
while (tt--) {
solve();
}
return 0;
}