Submission #1124937

#	Time	Username	Problem	Language	Result	Execution time	Memory
1124937		seiryuu	Schools (IZhO13_school)	C++20	25 / 100	70 ms	6080 KiB

school

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

struct C {
    int a, b;
    long long d;
};

int main() {
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    int n, m, s;
    cin >> n >> m >> s;
    vector<C> v(n);
    for (int i = 0; i < n; i++) {
        cin >> v[i].a >> v[i].b;
        v[i].d = (long long)v[i].a - v[i].b;
    }
    sort(v.begin(), v.end(), [&](const C &x, const C &y) {
        return x.d != y.d ? x.d > y.d : x.a > y.a;
    });
    long long sa = 0, sb = 0;
    for (int i = 0; i < m; i++) sa += v[i].a;
    vector<int> r;
    for (int i = m; i < n; i++) r.push_back(v[i].b);
    if (s > 0) {
        if (s >= (int)r.size()) {
            for (auto x : r) sb += x;
        } else {
            nth_element(r.begin(), r.begin() + s, r.end(), greater<int>());
            for (int i = 0; i < s; i++) sb += r[i];
        }
    }
    cout << sa + sb;
}

• Subtask 1: 25 / 100