Submission #142412

#	Time	Username	Problem	Language	Result	Execution time	Memory
142412		meatrow	K blocks (IZhO14_blocks)	C++17	100 / 100	181 ms	41532 KiB

blocks

//#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;

const int N = 1e5 + 5;
const int K = 105;

int dp[K][N];
int a[N];

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    int n, k;
    cin >> n >> k;
    for (int i = 1; i <= n; i++) {
        cin >> a[i];
        dp[1][i] = max(dp[1][i - 1], a[i]);
    }
    for (int i = 2; i <= k; i++) {
        vector<pair<int, int>> kek;
        for (int j = 1; j <= n; j++) {
            int cur = dp[i - 1][j - 1];
            if (!cur) {
                cur = 1e9;
            }
            while (!kek.empty() && kek.back().first < a[j]) {
                cur = min(cur, kek.back().second);
                kek.pop_back();
            }
            if (kek.empty() || a[j] + cur < kek.back().first + kek.back().second) {
                kek.emplace_back(a[j], cur);
            }
            dp[i][j] = kek.back().first + kek.back().second;
        }
    }
    cout << dp[k][n];
    return 0;
}

• Subtask 1: 14 / 14
• Subtask 2: 18 / 18
• Subtask 3: 21 / 21
• Subtask 4: 47 / 47