結果
| 問題 | No.1084 積の積 |
| コンテスト | |
| ユーザー |
T1610
|
| 提出日時 | 2020-06-22 12:19:31 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 59 ms / 2,000 ms |
| コード長 | 3,612 bytes |
| コンパイル時間 | 1,506 ms |
| コンパイル使用メモリ | 169,548 KB |
| 実行使用メモリ | 6,944 KB |
| 最終ジャッジ日時 | 2024-07-03 18:39:31 |
| 合計ジャッジ時間 | 3,462 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 5 |
| other | AC * 27 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) REP(i,0,n)
#define REP(i,s,e) for(int i=(s); i<(int)(e); i++)
#define repr(i, n) REPR(i, n, 0)
#define REPR(i, s, e) for(int i=(int)(s-1); i>=(int)(e); i--)
#define all(r) r.begin(),r.end()
#define rall(r) r.rbegin(),r.rend()
typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vl;
const ll INF = 1e18;
const ll MOD = 1e9 + 7;
template<typename T> T chmax(T& a, const T& b){return a = (a > b ? a : b);}
template<typename T> T chmin(T& a, const T& b){return a = (a < b ? a : b);}
#define DEBUG_MODE
#ifdef DEBUG_MODE
#define dump(x) cout << #x << " : " << x << " "
#define dumpL(x) cout << #x << " : " << x << '\n'
#define LINE cout << "line : " << __LINE__ << " "
#define LINEL cout << "line : " << __LINE__ << '\n'
#define dumpV(v) cout << #v << " : ["; for(auto& t : v) cout << t << ", "; cout<<"]" << " "
#define dumpVL(v) cout << #v << " : ["; for(auto& t : v) cout << t << ", "; cout<<"]" << endl
#define STOP assert(false)
#else
#define dump(x)
#define dumpL(x)
#define LINE
#define LINEL
#define dumpV(v)
#define dumpVL(v)
#define STOP assert(false)
#endif
#define mp make_pair
namespace std {
template<class S, class T>
ostream &operator <<(ostream& out, const pair<S, T>& a) {
out << '(' << a.fi << ", " << a.se << ')';
return out;
}
}
template <typename T, typename U> T pow_fast(T x, U n) {
T ret = (T)1;
while(n) {
if(n & (U)1) ret *= x;
x *= x;
n >>= 1;
}
return ret;
}
template <typename ModType, ModType MOD> struct ModInt {
ModType val;
ModInt() : val(0) {}
ModInt(ModType x) : val(x % MOD) {
if(val < 0) val += MOD;
};
operator ModType() const { return val; }
ModInt &operator+=(const ModInt &m) {
val += m.val;
if(val >= MOD) val -= MOD;
return *this;
}
ModInt &operator-=(const ModInt &m) {
val -= m.val;
if(val < 0) val += MOD;
return *this;
}
ModInt &operator*=(const ModInt &m) {
(val *= m.val) %= MOD;
return *this;
}
ModInt &operator/=(const ModInt &m) {
*this *= m.inverse();
return *this;
}
ModInt operator+(const ModInt &m) const { return ModInt(*this) += m; }
ModInt operator-(const ModInt &m) const { return ModInt(*this) -= m; }
ModInt operator*(const ModInt &m) const { return ModInt(*this) *= m; }
ModInt operator/(const ModInt &m) const { return ModInt(*this) /= m; }
ModInt inverse() const { return pow_fast(*this, MOD - 2); }
ModInt pow(ModType n) const {return pow_fast(*this, n); }
friend std::ostream &operator<<(std::ostream &os, const ModInt &rhs) {
os << rhs.val;
return os;
}
friend std::istream &operator>>(std::istream &is, ModInt &rhs) {
ModType value;
is >> value;
rhs = ModInt(value);
return is;
}
};
using mint = ModInt<ll, MOD>;
int main(){
int n;
cin >> n;
vl a(n);
rep(i, n) cin >> a[i];
rep(i, n) if(a[i] == 0) {
cout << 0 << '\n';
return 0;
}
mint ans = a[0];
ll x = a[0];
mint y = a[0];
auto check = [&](int i) {
return x * a[i] < 1e9;
};
int l = 0, r = 1;
while(l < n) {
if(r == n || !check(r)) {
y /= mint(x);
x /= a[l];
l++;
}
else {
x *= a[r];
y *= mint(a[r]).pow(r - l + 1);
++r;
ans *= y;
}
// dump(l); dump(r); dump(x);dumpL(y);
}
cout << ans << '\n';
return 0;
}
T1610