Submission #885109

#	Time	Username	Problem	Language	Result	Execution time	Memory
885109		votranngocvy	K blocks (IZhO14_blocks)	C++14	53 / 100	1012 ms	4696 KiB

blocks

#include <bits/stdc++.h>
using namespace std;

#define int long long
const int N = 1e5 + 5;
const int inf = 0x3f3f3f3f3f3f3f3f;
int a[N],st[4 * N],n,k,dp[N][105];

void build(int id,int l,int r) {
    if (l == r) {
        st[id] = a[l];
        return;
    }
    int mid = (l + r) / 2;
    build(id * 2,l,mid);
    build(id * 2 + 1,mid + 1,r);
    st[id] = max(st[id * 2],st[id * 2 + 1]);
}

int get(int id,int l,int r,int u,int v) {
    if (v < l || r < u) return -inf;
    if (u <= l && r <= v) return st[id];
    int mid = (l + r) / 2;
    return max(get(id * 2,l,mid,u,v),get(id * 2 + 1,mid + 1,r,u,v));
}

signed 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];
    build(1,1,n);
    for (int i = 0; i <= k; i++)
        for (int j = 0; j <= n; j++) dp[i][j] = inf;
    dp[0][0] = 0;
    for (int i = 1; i <= k; i++)
        for (int j = 1; j <= n; j++)
            for (int z = 0; z < j; z++)
                dp[i][j] = min(dp[i][j],dp[i - 1][z] + get(1,1,n,z + 1,j));
    cout << dp[k][n] << "\n";
}

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