Submission #1291937

#	Time	Username	Problem	Language	Result	Execution time	Memory
1291937		thaibeo123	Art Exhibition (JOI18_art)	C++20	100 / 100	123 ms	8260 KiB

art

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

#define NAME "A"
#define ll long long
#define fi first
#define se second
#define pb push_back
#define all(x) x.begin(), x.end()
#define MASK(x) (1ll << (x))
#define BIT(x, i) (((x) >> (i)) & 1)

const int N = 5e5 + 5;

int n;
pair<ll, int> a[N];

void input() {
    cin >> n;
    for (int i = 1; i <= n; i++) {
        cin >> a[i].fi >> a[i].se;
    }
    sort(a + 1, a + 1 + n);
}

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

signed main() {
    if (fopen(NAME".INP", "r")) {
        freopen(NAME".INP", "r", stdin);
        freopen(NAME".OUT", "w", stdout);
    }
    cin.tie(0)->sync_with_stdio(0);

    int t = 1;
    //cin >> t;
    while (t--) {
        input();
        solve();
    }

    return 0;
}

Compilation message (stderr)

art.cpp: In function 'int main()':
art.cpp:38:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |         freopen(NAME".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
art.cpp:39:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |         freopen(NAME".OUT", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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