Submission #1097779

#	Time	Username	Problem	Language	Result	Execution time	Memory
1097779		SulA	Art Exhibition (JOI18_art)	C++17	0 / 100	0 ms	348 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 ordered_set = tree<long long,null_type,less_equal<>,rb_tree_tag,tree_order_statistics_node_update>;

#define int long long

struct node {
    int sum, suff;
    friend node operator+ (node l, node r) {
        return {
            l.sum + r.sum,
            max(r.suff, l.suff + r.sum)
        };
    }
};

struct segtree {
    vector<node> tree;
    int offset = 1;

    segtree(int n) {
        while (offset < n) offset <<= 1;
        tree.resize(offset << 1, {0, 0});
    }
};

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

    int n; cin >> n;
    pair<int,int> a[n];
    for (int i = 0; i < n; cin >> a[i].first >> a[i++].second);
    sort(a, a + n);
    long long ans = 0;
    node thing = {0, 0};

    for (int i = 0; i < n-1; i++) {
        ans = max(ans, a[i].second + thing.suff);
        if (i < n-1) thing = thing + (node){-(a[i+1].first - a[i].first) + a[i].second,
                                            -(a[i+1].first - a[i].first) + a[i].second};
    }
    cout << ans;
}

Compilation message (stderr)

art.cpp: In function 'int main()':
art.cpp:37:52: warning: operation on 'i' may be undefined [-Wsequence-point]
   37 |     for (int i = 0; i < n; cin >> a[i].first >> a[i++].second);
      |                                                   ~^~

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