Submission #1289041

#	Time	Username	Problem	Language	Result	Execution time	Memory
1289041		Bahamin	Bigger segments (IZhO19_segments)	C++20	100 / 100	155 ms	45300 KiB

segments

#include <bits/stdc++.h>

using namespace std;

template<typename A, typename B> ostream& operator<<(ostream &os, const pair<A, B> &p) { return os << '(' << p.first << ", " << p.second << ')'; }
template<typename T_container, typename T = typename enable_if<!is_same<T_container, string>::value, typename T_container::value_type>::type> ostream& operator<<(ostream &os, const T_container &v) { os << '{'; string sep; for (const T &x : v) os << sep << x, sep = ", "; return os << '}'; }

#define ll long long
#define ld long double
#define all(a) (a).begin(), (a).end()
#define lid chs[id].first
#define rid chs[id].second
#define mid ((r + l) >> 1)
#define sui cout.tie(NULL); cin.tie(NULL); ios_base::sync_with_stdio(false)
const int MAX_N = 5e5 + 5;
const int MOD = 1e9 + 7;
const ll INF = 1e18;
const ld EPS = 1e-9;
const int LOG = 60;

void solve() {
    int n;
    cin >> n;
    int a[n];
    ll ps[n + 1];
    pair<int, ll> dp[n + 1];
    for (int i = 0; i < n; i++) cin >> a[i], ps[i + 1] = ps[i] + a[i];
    int ans = 0;
    set<pair<ll, int>> al;
    for (int i = 0; i < n; i++)
    {
        while (al.size() && (*al.begin()).first <= ps[i + 1])
        {
            int ind = (*al.begin()).second;
            al.erase(al.begin());
            ans = max(ans, ind);
        }
        dp[i + 1] = {dp[ans].first + 1, ps[i + 1] - ps[ans]};
        al.insert({ps[i + 1] + dp[i + 1].second, i + 1});
    }
    cout << dp[n].first << "\n";
}

int main() {
    sui;
    int tc = 1;
    //cin >> tc;
    for (int t = 1; t <= tc; t++) {
        solve();
    }
}

• Subtask 1: 13 / 13
• Subtask 2: 14 / 14
• Subtask 3: 10 / 10
• Subtask 4: 36 / 36
• Subtask 5: 27 / 27