Submission #418047

#	Time	Username	Problem	Language	Result	Execution time	Memory
418047		oofsizelarge	Art Exhibition (JOI18_art)	C++14	100 / 100	594 ms	24944 KiB

art

#include <iostream>
#include <algorithm>
#include <vector>
#include <climits>

using namespace std;

struct Artwork {
  long long a;
  int b;

  bool operator < (const Artwork& other) const {
    return a < other.a;
  }
};

int main()
{
    int n;
    cin >> n;

    vector < Artwork > gallery(n + 1);
    for (int i = 1; i <= n; ++i) {
      cin >> gallery[i].a >> gallery[i].b;
    }

    sort(gallery.begin() + 1, gallery.end());

    vector < long long > bPartialSums(n + 1);
    for (int i = 1; i <= n; ++i) {
      bPartialSums[i] = bPartialSums[i - 1] + gallery[i].b;
    }

    long long suffixMax = LLONG_MIN;
    long long ans = 0LL;
    for (int i = n; i > 0; --i) {
      suffixMax = max(suffixMax, bPartialSums[i] - gallery[i].a);
      ans = max(ans, suffixMax - bPartialSums[i - 1] + gallery[i].a);
    }

    cout << ans << '\n';

    return 0;
}

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