Submission #949486

#	Time	Username	Problem	Language	Result	Execution time	Memory
949486		LOLOLO	Schools (IZhO13_school)	C++17	70 / 100	102 ms	13908 KiB

school

#include <bits/stdc++.h>
typedef long long ll;

#define           f    first
#define           s    second
#define           pb    push_back
#define           ep    emplace
#define           eb    emplace_back
#define           lb    lower_bound
#define           ub    upper_bound
#define       all(x)    x.begin(), x.end()
#define      rall(x)    x.rbegin(), x.rend()
#define   uniquev(v)    sort(all(v)), (v).resize(unique(all(v)) - (v).begin())
#define     mem(f,x)    memset(f , x , sizeof(f))
#define        sz(x)    (int)(x).size()
#define  __lcm(a, b)    (1ll * ((a) / __gcd((a), (b))) * (b))
#define          mxx    *max_element
#define          mnn    *min_element
#define    cntbit(x)    __builtin_popcountll(x)

using namespace std;
const int N = 4e5 + 100;
const int M = 2e5;

bool cmp(pair <int, int> A, pair <int, int> B) {
    return A.f - A.s > B.f - B.s;
}

ll pr[N], suff[N];

int solve() {
    int n, m, s;
    cin >> n >> m >> s;

    vector <pair <int, int>> save;
    for (int i = 0; i < n; i++) {
        int a, b;
        cin >> a >> b;
        save.pb({a, b});
    }

    sort(all(save), cmp);
    priority_queue <ll, vector <ll>, greater <ll>> pq;
    ll sum = 0;

    for (int i = 0; i < n; i++) {
        pq.push(save[i].f);
        sum += save[i].f;
        while (sz(pq) > m) {
            sum -= pq.top();
            pq.pop();
        }

        pr[i] = sum;
    }

    while (sz(pq))
        pq.pop();
    
    sum = 0;
    for (int i = n - 1; i >= 0; i--) {
        pq.push(save[i].s);
        sum += save[i].s;
        while (sz(pq) > s) {
            sum -= pq.top();
            pq.pop();
        }

        suff[i] = sum;
    }

    ll ans = 0;
    for (int i = 0; i < n - 1; i++) {
        ans = max(ans, pr[i] + suff[i + 1]);
    }

    return ans;
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    int t = 1;
    //cin >> t;

    while (t--) {
        cout << solve() << '\n';
    }
}

• Subtask 1: 70 / 100