Submission #1260438

#	Time	Username	Problem	Language	Result	Execution time	Memory
1260438		tminh	Art Exhibition (JOI18_art)	C++20	100 / 100	115 ms	8276 KiB

art

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

#define task ""
#define ll long long
#define endl '\n'
#define fi first
#define se second
#define vall(a) (a).begin(), (a).end()
#define sze(a) (int)a.size()
#define pii pair<int, int>
#define pll pair<ll, ll>


#define ep emplace_back
#define pb push_back
#define pf push_front


const ll mod = 1e9 + 7;
const int N = 1e6 + 5;
const ll oo = 1e18;

bool START;

int n;
pll a[N];

inline void solve() {
	sort(a + 1, a + 1 + n);
	
	ll sum = 0, ans = -oo;
	
	ll premin = -a[1].fi;
	for (int i = 1; i <= n; ++i) {
		sum += a[i].se;
		
		ans = max(ans, sum - premin - a[i].fi);
		if (i <= n) premin = min(premin, sum - a[i + 1].fi);
	}
	cout << ans;
}


inline void input() {
    cin >> n;
    for (int i = 1; i <= n; ++i) cin >> a[i].fi >> a[i].se;
    return solve();
}
bool END;

int main() {
    if(fopen(task ".inp", "r")) {
        freopen(task ".inp", "r", stdin);
        freopen(task ".out", "w", stdout);
    }
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr); cout.tie(nullptr);

    input();
    
    
    cerr << endl << "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << 's' << endl;
    cerr << "Memory: " << fabs ((&END - &START)) / 1048576.0 << "MB\n";
    return 0;
}

Compilation message (stderr)

art.cpp: In function 'int main()':
art.cpp:54:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   54 |         freopen(task ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
art.cpp:55:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   55 |         freopen(task ".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

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