Submission #296974

#	Time	Username	Problem	Language	Result	Execution time	Memory
296974		ahmad_salah	K blocks (IZhO14_blocks)	C++17	0 / 100	1 ms	512 KiB

blocks

//#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
#include <bits/stdc++.h>
using namespace std;

const int M = 1e5 + 1;
int big = 1e9;

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int n, k;
    cin >> n >> k;
    int dp[n + 1][k + 1], a[n], greater[n];

    for (int &x : a)
        cin >> x;

    stack<int> st;
    for (int i = 0; i < n; i++) {
        while (!st.empty() && a[st.top()] < a[i])
            greater[st.top()] = i, st.pop();
        st.push(i);
    }
    while (!st.empty())
        greater[st.top()] = n, st.pop();

    for (int i = 0; i < k; i++)
        dp[n][i] = big;
    for (int i = 0; i < n; i++)
        dp[i][k] = big;
    dp[n][k] = 0;

    for (int i = n - 1; i >= 0; i--)
        for (int j = k - 1; j >= 0; j--)
            dp[i][j] = min(dp[greater[i]][j], a[i] + dp[i + 1][j + 1]);
    cout << dp[0][0] << '\n';
}

• Subtask 1: 0 / 14
• Subtask 2: 0 / 18
• Subtask 3: 0 / 21
• Subtask 4: 0 / 47