Submission #530096

#	Time	Username	Problem	Language	Result	Execution time	Memory
530096		buidangnguyen05	Art Exhibition (JOI18_art)	C++14	0 / 100	1 ms	332 KiB

art

/* input

*/

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

typedef long long ll;
const int N = 5e5 + 10;
ll pref[N], mx[N];
pair<ll, int> a[N];

signed main() {
	cin.tie(0)->sync_with_stdio(0);
	if (fopen("task.inp", "r")) {
		freopen("task.inp", "r", stdin);
		freopen("task.out", "w", stdout);
	}

	int n; cin >> n;
	for (int i = 1; i <= n; ++i) cin >> a[i].first >> a[i].second;
	
	sort(a + 1, a + n + 1);
	for (int i = 1; i <= n; ++i) pref[i] = pref[i - 1] + a[i].second;
	
	for (int i = n; i; --i) mx[i] = max(mx[i + 1], pref[i] - a[i].first);
	ll res = 0;
	for (int i = 1; i <= n; ++i) res = max(res, a[i].first - pref[i - 1] + mx[i]);

	cout << res << "\n";
}

Compilation message (stderr)

art.cpp: In function 'int main()':
art.cpp:16:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |   freopen("task.inp", "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
art.cpp:17:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |   freopen("task.out", "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 50