Submission #1290370

#	Time	Username	Problem	Language	Result	Execution time	Memory
1290370		BlockOG	Hiring (IOI09_hiring)	C++20	100 / 100	363 ms	18440 KiB

hiring

#include <bits/stdc++.h>

// meeeooowwwww mrrowwww :3
// go play vivid/stasis!! now!!!! https://vividstasis.gay

#define fo(i, a, b) for (auto i = (a); i < (b); i++)
#define of(i, a, b) for (auto i = (b); i-- > (a);)
#define f first
#define s second
#define pb push_back
#define lb lower_bound
#define ub upper_bound
#define be(a) a.begin(), a.end()
using namespace std;

int ____init = []{
    ios::sync_with_stdio(false);
    cin.tie(NULL), cout.tie(NULL);
    return 0;
}();

struct Fraction {
    long long t, d;

    Fraction() : t(0), d(1) {}
    Fraction(long long t, long long d) : t(t), d(d) {}

    bool operator<(const Fraction &other) const {
        return t * other.d < other.t * d;
    }
};

pair<Fraction, int> a[500000];

bool comp(pair<Fraction, int> l, pair<Fraction, int> r) {
    return l.f.d < r.f.d;
}

int main() {
    int n; long long w; cin >> n >> w;
    fo(i, 0, n) cin >> a[i].f.t >> a[i].f.d, a[i].s = i;
    sort(a, a + n);

    int res_size = 0, res_i = 0;
    long long mqsum = 0;
    Fraction mp;

    vector<pair<Fraction, int>> q;
    long long qsum = 0;
    fo(i, 0, n) {
        qsum += a[i].f.d;
        q.pb(a[i]), push_heap(be(q), comp);
        while (a[i].f.t * qsum > w * a[i].f.d) qsum -= q[0].f.d, pop_heap(be(q), comp), q.pop_back();

        if (q.size() > res_size || q.size() == res_size && a[i].f.t * qsum * mp.d < mp.t * mqsum * a[i].f.d) {
            res_size = q.size();
            res_i = i;
            mqsum = qsum;
            mp = a[i].f;
        }
    }

    q.clear();
    qsum = 0;
    fo(i, 0, res_i + 1) {
        qsum += a[i].f.d;
        q.pb(a[i]), push_heap(be(q), comp);
        while (a[i].f.t * qsum > w * a[i].f.d) qsum -= q[0].f.d, pop_heap(be(q), comp), q.pop_back();
    }

    cout << q.size() << endl;
    for (auto [_, i] : q) cout << i + 1 << endl;
}

• Subtask 1: 30 / 30
• Subtask 2: 28 / 28
• Subtask 3: 6 / 6
• Subtask 4: 6 / 6
• Subtask 5: 6 / 6
• Subtask 6: 6 / 6
• Subtask 7: 6 / 6
• Subtask 8: 6 / 6
• Subtask 9: 6 / 6