Submission #94481

#	Time	Username	Problem	Language	Result	Execution time	Memory
94481		fedoseevtimofey	Art Exhibition (JOI18_art)	C++14	100 / 100	333 ms	26872 KiB

art

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;

// pref[j + 1] - pref[i] - (a[j] - a[i])
// pref[j + 1] - a[j] - pref[i] + a[i]


int main() {
    ios_base::sync_with_stdio(false); cin.tie(0); cout.setf(ios::fixed); cout.precision(20);
    #ifdef LOCAL
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    #endif
    int n;
    cin >> n;
    vector <ll> a(n), b(n);
    for (int i = 0; i < n; ++i) {
        cin >> a[i] >> b[i];
    }
    vector <int> idx(n);
    iota(idx.begin(), idx.end(), 0);
    sort(idx.begin(), idx.end(), [&] (int i, int j) {
        return a[i] < a[j];
    });
    vector <ll> pref(n + 1);
    for (int i = 0; i < n; ++i) {
        pref[i + 1] = pref[i] + b[idx[i]];
    }
    ll ans = 0;
    ll mx = -2e18;
    for (int i = 0; i < n; ++i) {
        mx = max(mx, a[idx[i]] - pref[i]);
        ans = max(ans, mx + pref[i + 1] - a[idx[i]]);
    }
    cout << ans << '\n';
}

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