Submission #1101795

#	Time	Username	Problem	Language	Result	Execution time	Memory
1101795		SulA	Art Exhibition (JOI18_art)	C++17	100 / 100	140 ms	8440 KiB

art

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define bitcount __builtin_popcountll
using namespace std;
using namespace __gnu_pbds;
using namespace chrono;

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr); cout.tie(nullptr);

    int n; cin >> n;
#define cost first
#define value second
    pair<long long,long long> a[n];
    for (int i = 0; i < n; cin >> a[i].cost >> a[i++].value);
    sort(a, a + n);

    // p[i] - a[i] + a[j] - p[j-1]
    long long sum = 0, pref = 0, ans = 0;
    for (int i = 0; i < n; i++) {
        pref = max(pref, a[i].cost - sum);
        sum += a[i].value;
        ans = max(ans, sum - a[i].cost + pref);
//        ans = max(ans, a[i].value);
    }
    cout << ans;
    
}

Compilation message (stderr)

art.cpp: In function 'int main()':
art.cpp:17:51: warning: operation on 'i' may be undefined [-Wsequence-point]
   17 |     for (int i = 0; i < n; cin >> a[i].cost >> a[i++].value);
      |                                                  ~^~

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