Submission #873874

#	Time	Username	Problem	Language	Result	Execution time	Memory
873874		noiaint	Schools (IZhO13_school)	C++17	100 / 100	86 ms	16044 KiB

school

#include <bits/stdc++.h>
#define int long long

using namespace std;

#define file ""

#define mp make_pair
#define fi first
#define se second
#define all(x) x.begin(), x.end()

#define getbit(x, i) (((x) >> (i)) & 1)
#define bit(x) (1LL << (x))
#define popcount __builtin_popcountll

mt19937_64 rd(chrono::steady_clock::now().time_since_epoch().count());
int rand(int l, int r) {
    return l + rd() % (r - l + 1);
}

const int N = 1e6 + 5;
const int mod = (int)1e9 + 7; // 998244353;
const int lg = 25; // lg + 1
const int oo = 1e9;
const long long ooo = 1e18;

template<class X, class Y> bool mini(X &a, Y b) {
    return a > b ? (a = b, true) : false;
}
template<class X, class Y> bool maxi(X &a, Y b) {
    return a < b ? (a = b, true) : false;
}
void add(int &a, int b) {
    a += b;
    if (a >= mod) a -= mod;
    if (a < 0) a += mod;
}

int n, m, s;
pair<int, int> a[N];
int f[N], g[N];

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    // freopen(file".inp", "r", stdin);
    // freopen(file".out", "w", stdout);

    cin >> n >> m >> s;
    for (int i = 1; i <= n; ++i) 
    	cin >> a[i].fi >> a[i].se;

    sort(a + 1, a + n + 1, [&] (pair<int, int> x, pair<int, int> y) {
    	return x.fi - x.se > y.fi - y.se;
    });

    priority_queue<int, vector<int>, greater<int> > q;

    for (int i = 1; i <= n; ++i) {
    	f[i] = f[i - 1] + a[i].fi;
    	q.push(a[i].fi);
    	if ((int) q.size() > m) {
    		f[i] -= q.top();
    		q.pop();
    	}
    }

    while (q.size()) q.pop();

    for (int i = n; i >= 1; --i) {
    	g[i] = g[i + 1] + a[i].se;
    	q.push(a[i].se);
    	if ((int) q.size() > s) {
    		g[i] -= q.top();
    		q.pop();
    	}
    }

    int res = 0;
    for (int i = m; i <= n - s; ++i) res = max(res, f[i] + g[i + 1]);

    cout << res;

    return 0;
}

/*

*/

• Subtask 1: 100 / 100