Submission #168764

#	Time	Username	Problem	Language	Result	Execution time	Memory
168764		NHDanDz	K blocks (IZhO14_blocks)	C++14	0 / 100	41 ms	41592 KiB

blocks

/// NHDanDz
#include <bits/stdc++.h>
#define nmax 100005
#define F first
#define S second
#define PB push_back
#define PF push_front
#define ll long long
//#define int ll
#define RyoLoveHentai "blocks"
#define pii pair<int,int>
#define reset(a) memset(a,0,sizeof(a))
using namespace std;
int n , k , a[nmax] , d[105][100005];
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    cin >> n >> k;
    for(int i = 1; i <= n; i++)
    {
        cin >> a[i];
    }
    memset(d, 0x3f, sizeof d);
    d[1][0] = 0;
    for(int i = 1; i <= n ; i++)
        d[1][i] = max(d[1][i - 1] , a[i]);
    for(int i = 2; i <= k; i++)
    {
        stack <pii> S;
        for(int j = i; j <= n; j++)
        {
            int MIN = d[i - 1][j - 1];
            //cout << MIN << " ";
            while(S.size() && a[S.top().S] <= a[j])
            {
                MIN = min(MIN , S.top().F);
                S.pop();
            }
            d[i][j] = min(d[i][S.size() ? S.top().S : 0] , MIN + a[j]);
            //cout << (S.size() ? S.top().S : 0) << " ";
            S.push({MIN , i});
        }
        //cout << endl;
    }
    cout << d[k][n];
}

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