Submission #507569

#	Time	Username	Problem	Language	Result	Execution time	Memory
507569		tabr	Hiring (IOI09_hiring)	C++17	47 / 100	679 ms	35452 KiB

hiring

#include <bits/stdc++.h>
using namespace std;
#ifdef tabr
#include "library/debug.cpp"
#else
#define debug(...)
#endif

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n;
    long long w;
    cin >> n >> w;
    vector<pair<int, int>> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i].first >> a[i].second;
    }
    sort(a.begin(), a.end(), [&](auto x, auto y) {
        if (x.first * y.second != x.second * y.first) {
            return x.first * y.second < x.second * y.first;
        }
        return x.first < y.first;
    });
    multiset<pair<int, int>> st;
    int sum = 0;
    int ans = 0;
    for (int i = 0; i < n; i++) {
        sum += a[i].second;
        st.emplace(a[i].second, i);
        while (sum * 1LL * a[i].first > w * a[i].second) {
            auto it = prev(st.end());
            sum -= it->first;
            st.erase(it);
        }
        ans = max(ans, (int) st.size());
    }
    st.clear();
    sum = 0;
    for (int i = 0; i < n; i++) {
        sum += a[i].second;
        st.emplace(a[i].second, i);
        while (sum * 1LL * a[i].first > w * a[i].second) {
            auto it = prev(st.end());
            sum -= it->first;
            st.erase(it);
        }
        if ((int) st.size() == ans) {
            cout << ans << '\n';
            for (auto p : st) {
                cout << p.second + 1 << '\n';
            }
            break;
        }
    }
    return 0;
}

• Subtask 1: 15 / 30
• Subtask 2: 14 / 28
• Subtask 3: 3 / 6
• Subtask 4: 3 / 6
• Subtask 5: 3 / 6
• Subtask 6: 3 / 6
• Subtask 7: 3 / 6
• Subtask 8: 3 / 6
• Subtask 9: 0 / 6