結果
| 問題 |
No.3073 Fraction Median
|
| コンテスト | |
| ユーザー |
SnowBeenDiding
|
| 提出日時 | 2025-03-22 16:09:04 |
| 言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 2,488 bytes |
| コンパイル時間 | 6,188 ms |
| コンパイル使用メモリ | 334,116 KB |
| 実行使用メモリ | 16,224 KB |
| 最終ジャッジ日時 | 2025-03-22 16:09:17 |
| 合計ジャッジ時間 | 12,745 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 4 TLE * 1 -- * 13 |
ソースコード
#include <atcoder/all>
#include <bits/stdc++.h>
#define rep(i, a, b) for (ll i = (ll)(a); i < (ll)(b); i++)
using namespace atcoder;
using namespace std;
typedef long long ll;
struct fraction {
ll p, q;
fraction(ll P = 0, ll Q = 1) : p(P), q(Q) {
ll g = gcd(p, q);
p /= g;
q /= g;
}
bool operator<(const fraction &other) const {
return p * other.q < other.p * q;
}
bool operator<=(const fraction &other) const {
return p * other.q <= other.p * q;
}
bool operator>(const fraction &other) const {
return p * other.q > other.p * q;
}
bool operator>=(const fraction &other) const {
return p * other.q >= other.p * q;
}
bool operator==(const fraction &other) const {
return p * other.q == other.p * q;
}
fraction operator+(const fraction &other) const {
return fraction(p * other.q + other.p * q, q * other.q);
}
fraction operator-(const fraction &other) const {
return fraction(p * other.q - other.p * q, q * other.q);
}
fraction operator*(const fraction &other) const {
return fraction(p * other.p, q * other.q);
}
fraction operator/(const fraction &other) const {
return fraction(p * other.q, q * other.p);
}
fraction operator+=(const fraction &other) { return *this = *this + other; }
fraction operator-=(const fraction &other) { return *this = *this - other; }
fraction operator*=(const fraction &other) { return *this = *this * other; }
fraction operator/=(const fraction &other) { return *this = *this / other; }
};
int main() {
cin.tie(0);
cout.tie(0);
ios::sync_with_stdio(0);
int n;
cin >> n;
vector<int> a(n);
rep(i, 0, n) cin >> a[i];
sort(a.begin(), a.end());
fraction ans = fraction(1, 1);
ll tar = (ll)n * (n - 1) / 2;
auto f = [&](fraction p) {
ll cnt = 0;
rep(i, 0, n) {
int ac = -1, wa = n;
while (wa - ac > 1) {
int m = ac + (wa - ac) / 2;
if (fraction(a[m], a[i]) > p)
wa = m;
else
ac = m;
}
cnt += ac + 1;
}
if (cnt >= tar)
ans = min(ans, p);
};
rep(i, 0, n - 1) {
fraction p = fraction(a[i + 1], a[i]);
f(p);
fraction q = fraction(a[i], a[i + 1]);
f(q);
}
cout << ans.p << " " << ans.q << endl;
}
SnowBeenDiding