Submission #488958

#	Time	Username	Problem	Language	Result	Execution time	Memory
488958		SlavicG	Art Exhibition (JOI18_art)	C++17	100 / 100	168 ms	17864 KiB

art

#include "bits/stdc++.h"
using namespace std;
 
#define ll long long
 
#define       forn(i,n)              for(int i=0;i<n;i++)
#define          all(v)              v.begin(), v.end()
#define         rall(v)              v.rbegin(),v.rend()
 
#define            pb                push_back
#define          sz(a)               (int)a.size()

#define int long long
const int N = 5e5 + 10;

ll suf_max[N];

void solve()
{ 
    for(int i = 0;i < N; ++i){
        suf_max[i] = LLONG_MIN;
    }
    int n;
    cin >> n;
    vector<pair<int,int>> a(n);
    vector<int> pref(n);
    for(int i = 0;i < n; ++i){
        cin >> a[i].first >> a[i].second;
    }

    sort(all(a));
    for(int i = 0;i < n; ++i){
        pref[i] = a[i].second;
        if(i)pref[i] += pref[i - 1];
    }
    for(int i = n - 1;i >= 0; --i){
        suf_max[i] = max(suf_max[i + 1], pref[i] - a[i].first);
    }
    ll ans = 0;
    for(int i = 0;i < n; ++i){
        ans = max(ans, a[i].second);
        if(i + 1 < n){
            ans = max(ans, suf_max[i + 1] - pref[i] + a[i].second + a[i].first);
        }
    }

    cout << ans << "\n";
}   
 
int32_t main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    int t = 1;
    //cin >> t;
    while(t--)
    {
        solve();
    }
}

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