Submission #1222497

#	Time	Username	Problem	Language	Result	Execution time	Memory
1222497		mingga	Art Exhibition (JOI18_art)	C++20	100 / 100	108 ms	12112 KiB

art

#include "bits/stdc++.h"

using namespace std;

#define ln "\n"
#define pb push_back
#define fi first
#define se second
#define all(x) (x).begin(), (x).end()
#define sz(x) ((int)(x).size())
#define int long long
const int mod = 1e9 + 7;
const int inf = 2e18;
const int N = 5e5 + 7;
int n, ps[N];
pair<int, int> a[N];

signed main() {
	cin.tie(0) -> sync_with_stdio(0);
	#define task ""
	if(fopen(task ".INP", "r")) {
		freopen(task ".INP", "r", stdin);
		freopen(task ".OUT", "w", stdout);
	}
	cin >> n;
	for(int i = 1; i <= n; i++) cin >> a[i].fi >> a[i].se;
	sort(a + 1, a + n + 1);
	int mn = 0 - a[1].fi;
	int ans = 0;
	for(int i = 1; i <= n; i++) {
		ps[i] = ps[i - 1] + a[i].se;
		ans = max(ans, ps[i] - a[i].fi - mn);
		mn = min(mn, ps[i] - a[i + 1].fi);
	}
	cout << ans << ln;
    cerr << "\nTime: " << clock() * 1000 / CLOCKS_PER_SEC;
}	

Compilation message (stderr)

art.cpp: In function 'int main()':
art.cpp:22:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |                 freopen(task ".INP", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
art.cpp:23:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |                 freopen(task ".OUT", "w", stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

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