제출 #1142417

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1142417		g4yuhg	K개의 묶음 (IZhO14_blocks)	C++20	0 / 100	0 ms	328 KiB

blocks

//Huyduocdithitp
#include <bits/stdc++.h>
typedef long long ll;
#define endl '\n'
#define yes cout<<"YES"<<endl;
#define no cout<<"NO"<<endl;
#define fi first
#define se second
#define pii pair<ll, ll>
#define inf 1e18
#define faster ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define MP make_pair
#define TASK "ghuy4g"
#define start if(fopen(TASK".inp","r")){freopen(TASK".inp","r",stdin);freopen(TASK".out","w",stdout);}
#define LOG 19
#define N 500005
using namespace std;
ll n, k;
ll a[N], f[N][101];
signed main(void) {
    faster;
    cin >> n >> k;
    for (int i = 1; i <= n; i ++) {
        cin >> a[i];
    }
    ll ln = 0;
    for (int i = 1; i <= n; i ++) {
        ln = max(ln, a[i]);
        f[i][1] = ln;
    }
    for (int j = 2; j <= k; j ++) {
        stack<pii> st;
        st.push({f[j - 1][j - 1], a[j]});
        ll mini = st.top().fi + st.top().se;
        for (int i = j; i <= n; i ++) {
            f[i][j] = mini;
            mini = inf;
            pii moi = {f[i][j - 1], a[i + 1]};
            while (st.size() && st.top().se <= a[i + 1]) {
                moi.fi = min(moi.fi, st.top().fi);
                st.pop();
            }
            if (st.size() && st.top().se > a[i + 1]) {
                mini = min(mini, st.top().fi + st.top().se);
            }
            st.push(moi);
            mini = min(mini, moi.fi + moi.se);
        }
    }
    cout << f[n][k];
    return 0;
}

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