Submission #576267

#	Time	Username	Problem	Language	Result	Execution time	Memory
576267		four_specks	Art Exhibition (JOI18_art)	C++17	100 / 100	215 ms	28744 KiB

art

#include <bits/stdc++.h>

using namespace std;

inline namespace
{
} // namespace

void solve()
{
    int n;
    cin >> n;

    vector<array<long, 2>> v(n);
    for (auto &[a, b] : v)
        cin >> a >> b;
    sort(v.begin(), v.end());

    vector<long> pref(n + 1, 0);
    for (int i = 0; i < n; i++)
        pref[i + 1] = pref[i] + v[i][1];

    vector diff(pref.begin() + 1, pref.end());
    for (int i = 0; i < n; i++)
        diff[i] -= v[i][0];

    long res = 0;

    long cur = LONG_MIN / 2;
    for (int i = n - 1; i >= 0; i--)
    {
        cur = max(cur, diff[i]);
        res = max(res, cur + v[i][0] - pref[i]);
    }

    cout << res << '\n';
}

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

    solve();

    return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 50 / 50