Submission #377164

#	Time	Username	Problem	Language	Result	Execution time	Memory
377164		smjleo	Art Exhibition (JOI18_art)	C++14	100 / 100	249 ms	15340 KiB

art

#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
#pragma GCC target("avx,avx2,fma")
using namespace std;
#define int long long
#define nl '\n'
#define io ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)
const int mod = 1000000007, mod2 = 998244353;

// change this
const int N = 500005;

int n, ans, maxi;
pair<int, int> arr[N];

signed main() {
    io;
    cin >> n;
    for (int i=0; i<n; i++) {
        cin >> arr[i].first >> arr[i].second;
    }

    sort(arr, arr+n);

    maxi = -1e18;

    for (int i=n-1; i>=0; i--) {
        maxi = max(maxi + arr[i].second, arr[i].second - arr[i].first);
        ans = max(ans, maxi + arr[i].first);
    }

    cout << ans << nl;
}

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