Bubble Tea

    1#include <bits/stdc++.h>
    2using namespace std;
    3using ll = long long;
    4using i128 = __int128;
    5const int inf = 1e9;
    6const ll INF = 1e18; //❄️
    7int main() {
    8    ios::sync_with_stdio(0); cin.tie(0); 
    9    int n; cin >> n;
    10    vector<int> v(n);
    11    for (int i = 0; i < n; i++) cin >> v[i];
    12    vector<int> dp(n + 1);
    13    for (int i = 1; i <= n; i++) {
    14        dp[i] = dp[i - 1] + v[i - 1];
    15        if (i >= 2) {
    16            dp[i] = min(dp[i], dp[i - 2] + max(v[i - 1], v[i - 2]) + min(v[i - 1], v[i - 2]) / 4 * 3);
    17            if (i >= 3) {
    18                vector<int> a = {v[i - 1], v[i - 2], v[i - 3]};
    19                sort(a.begin(), a.end());
    20                dp[i] = min(dp[i], dp[i - 3] + a[0] / 2 + a[1] + a[2]);
    21            }
    22        }
    23    }
    24    cout << dp[n] << '\n';
    25    return 0;
    26}