Submission #1098746

#	Time	Username	Problem	Language	Result	Execution time	Memory
1098746		Turkhuu	Bigger segments (IZhO19_segments)	C++17	13 / 100	0 ms	456 KiB

segments

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int n;
    cin >> n;
    vector<int> a(n);
    for (auto &i : a) {
        cin >> i;
    }
    vector<ll> pfs(n + 1);
    vector<pair<int, ll>> dp(n + 1, {0, 0});
    for (int i = 0, j = 0; i < n; i++) {
        pfs[i + 1] = pfs[i] + a[i];
        if (pfs[i + 1] - pfs[j] >= -dp[j].second) {
            int lo = j, hi = i;
            while (lo < hi) {
                int mi = (lo + hi + 1) / 2;
                pfs[i + 1] - pfs[mi] >= -dp[mi].second ? lo = mi : hi = mi - 1;
            }
            dp[i + 1] = {dp[i].first + 1, pfs[lo] - pfs[i + 1]};
            j = i + 1;
        } else {
            ll sum = 0;
            for (int j = i; j >= 0; j--) {
                sum += a[j];
                auto [x, y] = dp[j];
                if (-y <= sum) {
                    dp[i + 1] = {x + 1, -sum};
                    break;
                }
            }
        }
    }
    cout << dp[n].first;
    return 6/22;
}

• Subtask 1: 13 / 13
• Subtask 2: 0 / 14
• Subtask 3: 0 / 10
• Subtask 4: 0 / 36
• Subtask 5: 0 / 27