Submission #141541

#	Time	Username	Problem	Language	Result	Execution time	Memory
141541		meatrow	Divide and conquer (IZhO14_divide)	C++17	100 / 100	58 ms	7544 KiB

divide

//#pragma GCC optimize("O3")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,tune=native")
//#pragma GCC optimize ("unroll-loops")
#include <bits/stdc++.h>

using namespace std;

using ll = long long;


int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    int n;
    cin >> n;
    ll ans = 0;
    vector<ll> G(n + 1), E(n + 1), x(n + 1);
    vector<pair<ll, int>> kek(n);
    for (int i = 1; i <= n; i++) {
        ll g, d;
        cin >> x[i] >> g >> d;
        kek[i - 1] = { E[i - 1] - x[i], i - 1 };
        E[i] = E[i - 1] + d;
        G[i] = G[i - 1] + g;   
    }
    sort(kek.begin(), kek.end());
    vector<int> pref(n);
    pref[0] = kek[0].second;
    for (int i = 1; i < n; i++) {
        pref[i] = min(pref[i - 1], kek[i].second);
    }
    for (int i = 1; i <= n; i++) {
        int pos = upper_bound(kek.begin(), kek.end(), make_pair(E[i] - x[i], 0)) - kek.begin() - 1;
        if (pos >= 0 && pos < n) {
            ans = max(ans, G[i] - G[pref[pos]]);
        }
    }
    cout << ans;
    return 0; 
}

• Subtask 1: 17 / 17
• Subtask 2: 31 / 31
• Subtask 3: 52 / 52