結果

問題 No.1084 積の積
ユーザー kissshot7kissshot7
提出日時 2021-01-10 16:58:37
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
WA  
実行時間 -
コード長 4,085 bytes
コンパイル時間 1,563 ms
コンパイル使用メモリ 174,156 KB
実行使用メモリ 9,828 KB
最終ジャッジ日時 2024-05-01 04:30:04
合計ジャッジ時間 3,344 ms
ジャッジサーバーID
(参考情報)
judge5 / judge2
このコードへのチャレンジ
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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 3 ms
7,492 KB
testcase_01 AC 3 ms
7,492 KB
testcase_02 AC 3 ms
7,620 KB
testcase_03 AC 3 ms
7,620 KB
testcase_04 WA -
testcase_05 AC 9 ms
8,548 KB
testcase_06 AC 9 ms
8,544 KB
testcase_07 AC 3 ms
7,620 KB
testcase_08 AC 4 ms
7,488 KB
testcase_09 AC 12 ms
8,544 KB
testcase_10 AC 3 ms
7,620 KB
testcase_11 AC 3 ms
7,496 KB
testcase_12 AC 9 ms
8,296 KB
testcase_13 AC 16 ms
9,576 KB
testcase_14 AC 7 ms
8,000 KB
testcase_15 AC 7 ms
8,004 KB
testcase_16 AC 17 ms
9,824 KB
testcase_17 AC 8 ms
8,424 KB
testcase_18 AC 11 ms
8,548 KB
testcase_19 AC 17 ms
9,572 KB
testcase_20 AC 6 ms
7,744 KB
testcase_21 AC 7 ms
8,004 KB
testcase_22 AC 6 ms
7,748 KB
testcase_23 AC 11 ms
8,424 KB
testcase_24 AC 10 ms
8,420 KB
testcase_25 AC 16 ms
9,572 KB
testcase_26 WA -
testcase_27 WA -
testcase_28 WA -
testcase_29 WA -
testcase_30 WA -
testcase_31 WA -
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ソースコード

diff #

#include <bits/stdc++.h>
using namespace std;

//#define int long long
typedef long long ll;

typedef unsigned long long ul;
typedef unsigned int ui;
const ll mod = 1000000007;
// const ll mod = 998244353;
const ll INF = mod * mod;
const int INF_N = 1e+9;
typedef pair<int, int> P;
#define rep(i,n) for(int i=0;i<n;i++)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define Rep(i,sta,n) for(int i=sta;i<n;i++)
#define rep1(i,n) for(int i=1;i<=n;i++)
#define per1(i,n) for(int i=n;i>=1;i--)
#define Rep1(i,sta,n) for(int i=sta;i<=n;i++)
#define all(v) (v).begin(),(v).end()
typedef pair<ll, ll> LP;
typedef long double ld;
typedef pair<ld, ld> LDP;
const ld eps = 1e-12;
const ld pi = acos(-1.0);
//typedef vector<vector<ll>> mat;
typedef vector<int> vec;

//繰り返し二乗法
ll mod_pow(ll a, ll n, ll m) {
	ll res = 1;
	while (n) {
		if (n & 1)res = res * a%m;
		a = a * a%m; n >>= 1;
	}
	return res;
}

struct modint {
	ll n;
	modint() :n(0) { ; }
	modint(ll m) :n(m) {
		if (n >= mod)n %= mod;
		else if (n < 0)n = (n%mod + mod) % mod;
	}
	operator int() { return n; }
};
bool operator==(modint a, modint b) { return a.n == b.n; }
modint operator+=(modint &a, modint b) { a.n += b.n; if (a.n >= mod)a.n -= mod; return a; }
modint operator-=(modint &a, modint b) { a.n -= b.n; if (a.n < 0)a.n += mod; return a; }
modint operator*=(modint &a, modint b) { a.n = ((ll)a.n*b.n) % mod; return a; }
modint operator+(modint a, modint b) { return a += b; }
modint operator-(modint a, modint b) { return a -= b; }
modint operator*(modint a, modint b) { return a *= b; }
modint operator^(modint a, int n) {
	if (n == 0)return modint(1);
	modint res = (a*a) ^ (n / 2);
	if (n % 2)res = res * a;
	return res;
}

//逆元(Eucledean algorithm)
ll inv(ll a, ll p) {
	return (a == 1 ? 1 : (1 - p * inv(p%a, a)) / a + p);
}
modint operator/(modint a, modint b) { return a * modint(inv(b, mod)); }

const int max_n = 1 << 18;
modint fact[max_n], factinv[max_n];
void init_f() {
	fact[0] = modint(1);
	for (int i = 0; i < max_n - 1; i++) {
		fact[i + 1] = fact[i] * modint(i + 1);
	}
	factinv[max_n - 1] = modint(1) / fact[max_n - 1];
	for (int i = max_n - 2; i >= 0; i--) {
		factinv[i] = factinv[i + 1] * modint(i + 1);
	}
}
modint comb(int a, int b) {
	if (a < 0 || b < 0 || a < b)return 0;
	return fact[a] * factinv[b] * factinv[a - b];
}
using mP = pair<modint, modint>;

int dx[4] = { 0,1,0,-1 };
int dy[4] = { 1,0,-1,0 };




void solve() {
    int n; cin >> n;
    vector<ll> a, b;
    bool zero = false;
    rep(i, n){
        ll x; cin >> x;
        if(x == 0) zero = true;
        a.push_back(x);
    }
    if(zero){
        cout << 0 << endl;
        return;
    }

    modint res = 1;
    ll x = 1;
    int l = 0;
    rep(i, n){
        if(a[i] == 1){
            res *= modint(x);
            if(b.size() > 0 && b.back() < 0){
                b.back()--;
            }else{
                b.push_back(-1);
            }
        }else{
            if(x*a[i] >= 1e09){
                while(1){
                    if(b[l] < 0) l++;
                    else{
                        if(x / b[l] * a[i] >= 1e09){
                            x /= b[l];
                            l++;
                        }else{
                            x = x/b[l]*a[i];
                            l++;
                            if(b[l] < 0) l++;
                            break;
                        }
                    }
                }
            }else{
                x *= a[i];
            }
            b.push_back(a[i]);
            ll tmp = x;
            Rep(j, l, b.size()){
                if(b[j] > 0){
                    res *= modint(tmp);
                    tmp /= b[j];
                }else{
                    res *= modint(mod_pow(tmp, -b[j], mod));
                    j += -b[j]-1;
                }
            }
        }
    }

    cout << res.n << endl;
}

signed main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  //cout << fixed << setprecision(10);
  //init_f();
  //init();
  //int t; cin >> t; rep(i, t)solve();
  solve();
//   stop
    return 0;
}
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