Submission #1124946

#	Time	Username	Problem	Language	Result	Execution time	Memory
1124946		seiryuu	Schools (IZhO13_school)	C++20	25 / 100	68 ms	10428 KiB

school

#include <bits/stdc++.h>
using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(NULL);

    int n, m, s;
    cin >> n >> m >> s;

    vector<pair<int, int>> c(n);
    for (int i = 0; i < n; i++) {
        cin >> c[i].first >> c[i].second; 
    }

    vector<array<int, 3>> cities;
    cities.reserve(n);
    for (int i = 0; i < n; i++) {
        int a = c[i].first, b = c[i].second;
        cities.push_back({max(a, b), a, b});
    }

    sort(cities.begin(), cities.end(), [](auto &l, auto &r) {
        return l[0] > r[0];
    });

    int total = m + s;
    vector<array<int, 3>> sel(cities.begin(), cities.begin() + total);

    int m_sel = 0, s_sel = 0;
    long long sum = 0;

    vector<long long> mp_diff, sp_diff;

    for (auto &city : sel) {
        int a = city[1], b = city[2];
        if (a >= b) {
            m_sel++;
            sum += a;
            mp_diff.push_back(a - b);
        } else {
            s_sel++;
            sum += b;
            sp_diff.push_back(b - a);
        }
    }

    if (m_sel > m) {
        int flip = m_sel - m;
        sort(mp_diff.begin(), mp_diff.end());
        for (int i = 0; i < flip; i++) {
            sum -= mp_diff[i];
        }
    } else if (s_sel > s) {
        int flip = s_sel - s;
        sort(sp_diff.begin(), sp_diff.end());
        for (int i = 0; i < flip; i++) {
            sum -= sp_diff[i];
        }
    }

    cout << sum << "\n";

    return 0;
}

• Subtask 1: 25 / 100