Submission #966901

#	Time	Username	Problem	Language	Result	Execution time	Memory
966901		vjudge1	Art Exhibition (JOI18_art)	C++17	100 / 100	152 ms	24936 KiB

art

#include <bits/stdc++.h>
using namespace std;
#define int     long long
#define ll      long long
#define pii     pair <int, int> 
#define pb      push_back
#define mp      make_pair
#define dbg     puts("dbg");
#define outp(x) cout << #x << " = " << (x) << endl
#define all(x)  (x).begin(), (x).end()
#define test    int t; cin >> t; while(t--){solve();}
#define MOD     998244353
int fpb(int a,int b){if(b == 0){return a;}return fpb(b, a%b);}
int kpk(int a,int b){return (a*b)/fpb(a, b);}

int n, pref[500003];
pii art[500003];

// i ... j
// psum[j] - psum[i-1] - a[j] + a[i]
// psum[j] - a[j] + a[i] - psum[i-1]

void solve(){   
    cin >> n;
    for(int i=1; i<=n; i++){
        cin >> art[i].first >> art[i].second;
    }
    sort(art+1, art+n+1);
    for(int i=1; i<=n; i++){
        pref[i] = pref[i-1] + art[i].second;
    }
    int maxi = -2e18, ans = 0;
    for(int i=1; i<=n; i++){
        maxi = max(maxi, art[i].first - pref[i-1]);
        ans = max(ans, maxi + pref[i] - art[i].first);
    }
    cout << ans << endl;
}   


int32_t main() {
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    solve();
    return 0;
}

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