Submission #1181913

#	Time	Username	Problem	Language	Result	Execution time	Memory
1181913		mehmetkagan	Discharging (NOI20_discharging)	C++20	0 / 100	73 ms	40184 KiB

Discharging

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define int ll

const int INF = 1e18; // A large value to represent infinity

struct Segment {
    int index;
    ll best_val;
    int chargingTime;
};

int32_t main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    int N;
    cin >> N;

    vector<int> T(N);
    for (int i = 0; i < N; i++) {
        cin >> T[i];
    }

    vector<ll> dp(N + 1, INF);
    dp[0] = 0;

    stack<Segment> st;

    for (int i = 1; i <= N; i++) {
        ll m = T[i - 1];
        dp[i] = dp[i - 1] + T[i - 1];

        while (!st.empty() && st.top().chargingTime <= T[i - 1]) {
            Segment seg = st.top();
            st.pop();
            m = T[i - 1];
            dp[i] = min(dp[i], seg.best_val + i * m);
        }

        Segment newSeg = {i, dp[i] - i * T[i - 1], T[i - 1]};
        st.push(newSeg);
    }

    cout << dp[N] << '\n';
    
    return 0;
}

• Subtask 1: 0 / 9
• Subtask 2: 0 / 13
• Subtask 3: 0 / 25
• Subtask 4: 0 / 11
• Subtask 5: 0 / 14
• Subtask 6: 0 / 28