Submission #1202838

#	Time	Username	Problem	Language	Result	Execution time	Memory
1202838		andrejikus	Art Exhibition (JOI18_art)	C++20	100 / 100	119 ms	23912 KiB

art

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
void DBG() { cerr << "]" << endl; }
template<class H, class... T> void DBG(H h, T... t) { cerr << to_string(h); if(sizeof...(t)) cerr << ", "; DBG(t...); }
#define dbg(...) cerr << "[" << #__VA_ARGS__ << "]: [", DBG(__VA_ARGS__)

const int N = 5e5 + 3;
ll a[N], b[N], U[N], pref[N];

void solve() {
    int n; cin >> n;
    vector<pair<ll, ll>> vec;
    for (int i = 1; i <= n; i++) cin >> a[i] >> b[i], vec.push_back({a[i], b[i]});
    sort(vec.begin(), vec.end());
    ll ans = 0;
    for (int i = 1; i < n; i++) {
        U[i] = vec[i-1].second - (vec[i].first - vec[i-1].first);
        pref[i] = pref[i-1] + U[i];
    }

    ll mn = 0;
    for (int i = 1; i <= n; i++) {
        ll S = vec[i-1].second;
        //dbg(S, pref[i-1], mn, i);
        ans = max(ans, S + pref[i-1] - mn);
        mn = min(mn, pref[i]);
    }

    cout << ans << "\n";
}

signed main() {
    ios::sync_with_stdio(false); cin.tie(0);
	int t=1; //cin >> t;
	while (t--) {
        solve();
	}
}
/*
3
2 3
4 5
11 2
*/

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