結果

問題 No.3074 Divide Points Fairly
ユーザー 👑 AngrySadEight
提出日時 2025-03-28 21:54:50
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 91 ms / 2,000 ms
コード長 4,148 bytes
コンパイル時間 3,694 ms
コンパイル使用メモリ 180,600 KB
実行使用メモリ 7,328 KB
最終ジャッジ日時 2025-03-28 21:54:59
合計ジャッジ時間 7,602 ms
ジャッジサーバーID
（参考情報） 		judge1 / judge4
このコードへのチャレンジ
（要ログイン）
ファイルパターン 結果
sample AC * 3
other AC * 42
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

#include <algorithm>
#include <atcoder/all>
#include <bitset>
#include <cassert>
#include <cmath>
#include <ctime>
#include <functional>
#include <iomanip>
#include <iostream>
#include <map>
#include <queue>
#include <random>
#include <set>
#include <stack>
#include <string>
#include <tuple>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
using namespace std;
using namespace atcoder;
typedef long long ll;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define repr(i, n) for (int i = (int)(n) - 1; i >= 0; i--)
#define repk(i, k, n) for (int i = k; i < (int)(n); i++)
#define all(v) v.begin(), v.end()
#define mod1 1000000007
#define mod2 998244353
#define mod3 100000007
#define vi vector<int>
#define vs vector<string>
#define vc vector<char>
#define vl vector<ll>
#define vb vector<bool>
#define vvi vector<vector<int>>
#define vvc vector<vector<char>>
#define vvl vector<vector<ll>>
#define vvb vector<vector<bool>>
#define vvvi vector<vector<vector<int>>>
#define vvvl vector<vector<vector<ll>>>
#define pii pair<int, int>
#define pil pair<int, ll>
#define pli pair<ll, int>
#define pll pair<ll, ll>
#define vpii vector<pair<int, int>>
#define vpll vector<pair<ll, ll>>
#define vvpii vector<vector<pair<int, int>>>
#define vvpll vector<vector<pair<ll, ll>>>
template <typename T>
void debug(T e) {
    cerr << e << endl;
}
template <typename T>
void debug(vector<T> &v) {
    rep(i, v.size()) { cerr << v[i] << " "; }
    cerr << endl;
}
template <typename T>
void debug(vector<vector<T>> &v) {
    rep(i, v.size()) {
        rep(j, v[i].size()) { cerr << v[i][j] << " "; }
        cerr << endl;
    }
}
template <typename T>
void debug(vector<pair<T, T>> &v) {
    rep(i, v.size()) { cerr << v[i].first << " " << v[i].second << endl; }
}
template <typename T>
void debug(set<T> &st) {
    for (auto itr = st.begin(); itr != st.end(); itr++) {
        cerr << *itr << " ";
    }
    cerr << endl;
}
template <typename T>
void debug(multiset<T> &ms) {
    for (auto itr = ms.begin(); itr != ms.end(); itr++) {
        cerr << *itr << " ";
    }
    cerr << endl;
}
template <typename T>
void debug(map<T, T> &mp) {
    for (auto itr = mp.begin(); itr != mp.end(); itr++) {
        cerr << itr->first << " " << itr->second << endl;
    }
}
void debug_out() { cerr << endl; }
template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
    cerr << H << " ";
    debug_out(T...);
}
using mint = modint998244353;
void debug_mint1(vector<mint> &vec) {
    for (int i = 0; i < vec.size(); i++) {
        cerr << vec[i].val() << " ";
    }
    cerr << endl;
}
void debug_mint2(vector<vector<mint>> &vec) {
    for (int i = 0; i < vec.size(); i++) {
        for (int j = 0; j < vec[i].size(); j++) {
            cerr << vec[i][j].val() << " ";
        }
        cerr << endl;
    }
}
pll cnt(ll a, ll b, ll c, vector<ll> &x, vector<ll> &y) {
    ll upper = 0;
    ll lower = 0;
    for (ll i = 0; i < x.size(); i++) {
        if (a * x[i] + b * y[i] + c < 0) {
            upper++;
        }
        if (a * x[i] + b * y[i] + c > 0) {
            lower++;
        }
    }
    return make_pair(upper, lower);
}
int main() {
    ll N;
    cin >> N;
    vector<ll> x(2 * N);
    vector<ll> y(2 * N);
    for (ll i = 0; i < 2 * N; i++) {
        cin >> x[i] >> y[i];
    }
    // 傾きを乱択＋二分探索
    while (true) {
        ll a = rand() % 200000 - 100000;
        ll b = rand() % 200000 - 100000;
        if (a == 0 && b == 0) {
            continue;
        }
        ll cng = -20000000001;
        ll cok = 20000000001;
        while (cok - cng > 1) {
            ll cmid = (cng + cok) / 2;
            pll sans = cnt(a, b, cmid, x, y);
            // debug_out(a, b, cmid, sans.first, sans.second);
            if (cnt(a, b, cmid, x, y).first <= N) {
                cok = cmid;
            } else {
                cng = cmid;
            }
        }
        cok++;
        pll lans = cnt(a, b, cok, x, y);
        if (lans.first == N && lans.second == N) {
            cout << a << " " << b << " " << cok << endl;
            return 0;
        }
    }
}
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0