Submission #1274132

#	Time	Username	Problem	Language	Result	Execution time	Memory
1274132		almaz	Art Exhibition (JOI18_art)	C++20	100 / 100	132 ms	16024 KiB

art

#include <bits/stdc++.h>
using namespace std;

#define int long long
// #define endl '\n'
#define ff first
#define ss second
#define pb push_back
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define ar array

const int MOD = 1e9 + 7,INF = 1e18, N = 2e5 + 5;
/*
*/

int ans = 0;

void solve(){
	int n;
	cin >> n;
	vector <pair<int,int>> a(n);
	
	vector <int> sum(n);
	
	for(int i = 0;i < n;i++){
		cin >> a[i].ff >> a[i].ss;
	}
	sort(all(a));
	sum[0] = a[0].ss;
	for(int i = 1;i < n;i++){
		sum[i] = sum[i - 1] + a[i].ss;
	}
	vector <int> dp(n);
	dp[n - 1] = sum[n - 1] - a[n - 1].ff;
	for(int i = n - 2;i >= 0;i--){
		dp[i] = max(dp[i + 1] , sum[i] - a[i].ff);
	}
	int h = 0;
	for(int i = 0;i < n;i++){
		ans = max(dp[i] + a[i].ff - h, ans);
		h += a[i].ss;
	}
	// for(int i = 0;i < n;i++){
		// cout<< dp[i]<< ' ';
	// }
	// cout<<endl;
	cout<<ans<<endl;
}

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int ti = 1;
    while (ti--) {
		solve();
    }
}

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