結果
問題 | No.1084 積の積 |
ユーザー | nok0 |
提出日時 | 2020-06-19 22:39:27 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,612 bytes |
コンパイル時間 | 1,819 ms |
コンパイル使用メモリ | 176,100 KB |
実行使用メモリ | 6,948 KB |
最終ジャッジ日時 | 2024-07-03 15:11:57 |
合計ジャッジ時間 | 4,034 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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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 | 1 ms
6,812 KB |
testcase_01 | AC | 2 ms
6,944 KB |
testcase_02 | AC | 1 ms
6,940 KB |
testcase_03 | WA | - |
testcase_04 | WA | - |
testcase_05 | RE | - |
testcase_06 | AC | 43 ms
6,940 KB |
testcase_07 | RE | - |
testcase_08 | AC | 2 ms
6,940 KB |
testcase_09 | RE | - |
testcase_10 | RE | - |
testcase_11 | AC | 4 ms
6,940 KB |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | AC | 23 ms
6,940 KB |
testcase_18 | WA | - |
testcase_19 | WA | - |
testcase_20 | AC | 13 ms
6,940 KB |
testcase_21 | AC | 20 ms
6,940 KB |
testcase_22 | AC | 15 ms
6,944 KB |
testcase_23 | WA | - |
testcase_24 | WA | - |
testcase_25 | WA | - |
testcase_26 | WA | - |
testcase_27 | WA | - |
testcase_28 | WA | - |
testcase_29 | WA | - |
testcase_30 | WA | - |
testcase_31 | WA | - |
ソースコード
#include<bits/stdc++.h> using namespace std; #define FOR(i,l,r) for(long long i=(l);i<(r);++i) #define REP(i,n) FOR(i,0,n) #define REPS(i,n) FOR(i,1,n+1) #define RFOR(i,l,r) for(long long i=(l);i>=(r);--i) #define RREP(i,n) RFOR(i,n-1,0) #define RREPS(i,n) RFOR(i,n,1) #define int long long #define mp make_pair #define pb push_back #define eb emplace_back #define SZ(x) ((int)(x).size()) #define all(x) (x).begin(),(x).end() #define rall(x) (x).rbegin(),(x).rend() template<class T> inline bool chmin(T& a, T b) {if (a > b) {a = b; return true; }return false; } template<class T> inline bool chmax(T& a, T b) {if (a < b) {a = b; return true; }return false; } const int INF = 1e18; const int MOD = 1e9+7; // const int MOD = 998244353; const int MAX = 1000010; int fac[MAX],finv[MAX],inv[MAX]; //テーブル作成 void COMinit(){ fac[0]=fac[1]=1; finv[0]=finv[1]=1; inv[1]=1; for(int i=2;i<MAX;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; } } //nCkを求める int COM(int n,int k){ if(n<k)return 0; if(n<0||k<0)return 0; return fac[n]*(finv[k]*finv[n-k]%MOD)%MOD; } //ModInt template <typename T> T pow(T a, long long n, T e = 1) { T ret = e; while (n) { if (n & 1) ret *= a; a *= a; n >>= 1; } return ret; } template <int mod> struct ModInt { int x; ModInt() : x(0) {} ModInt(long long x_) { if ((x = x_ % mod + mod) >= mod) x -= mod; } ModInt& operator+=(ModInt rhs) { if ((x += rhs.x) >= mod) x -= mod; return *this; } ModInt& operator-=(ModInt rhs) { if ((x -= rhs.x) < 0) x += mod; return *this; } ModInt& operator*=(ModInt rhs) { x = (unsigned long long)x * rhs.x % mod; return *this; } ModInt& operator/=(ModInt rhs) { x = (unsigned long long)x * rhs.inv().x % mod; return *this; } ModInt operator-() const { return -x < 0 ? mod - x : -x; } ModInt operator+(ModInt rhs) const { return ModInt(*this) += rhs; } ModInt operator-(ModInt rhs) const { return ModInt(*this) -= rhs; } ModInt operator*(ModInt rhs) const { return ModInt(*this) *= rhs; } ModInt operator/(ModInt rhs) const { return ModInt(*this) /= rhs; } bool operator==(ModInt rhs) const { return x == rhs.x; } bool operator!=(ModInt rhs) const { return x != rhs.x; } ModInt inv() const { return pow(*this, mod - 2); } friend ostream& operator<<(ostream& s, ModInt<mod> a) { s << a.x; return s; } friend istream& operator>>(istream& s, ModInt<mod>& a) { s >> a.x; return s; } }; using mint = ModInt<MOD>; int Roundup_div(int x, int y) {return (x+(y-1))/y;} mint ans = 1 ,bef = 1; signed main(){ int n; cin >> n; vector<mint> a(n); vector<int> b(n); vector<mint> c(n); REP(i,n){ cin >> b[i]; } sort(all(b)); REP(i,n) a[i] = (mint)b[i]; vector<mint> mul(n,0); REP(i,n){ if(!i){ mul[i] = a[i]; c[i] = pow(a[i],n-i); } else{ mul[i] = mul[i-1] * a[i] * bef; c[i] = c[i-1] * pow(a[i],n-i); } bef *= a[i]; } REP(i,n){ int pl = lower_bound(all(b),Roundup_div(1e9,b[i])) - b.begin(); //cout << "pl!="<<pl<<endl; if(pl-1 <= i){ ans *= a[i]; continue; } mint x = (i ? c[i-1] : 1); mint y = x.inv(); if(pl and pl-1 >= i) ans *= (mul[pl-1]) * y ; } cout << ans << endl; }