Submission #736400

#	Time	Username	Problem	Language	Result	Execution time	Memory
736400		cdjs1432	K blocks (IZhO14_blocks)	C++17	0 / 100	20 ms	40288 KiB

blocks

#include <bits/stdc++.h>

using namespace std;
typedef long long ll;


int a[100005];
int dp[100005][102];
int main() {
    ios::sync_with_stdio(false);
    cin.tie(NULL);  cout.tie(NULL);
    
    memset(dp,0x3f,sizeof(dp));
    int n, k;
    cin >> n >> k;
    int maxx = 0;
    for (int i=1; i<=n; i++) {
        cin >> a[i];
        dp[i][1] = maxx = max(a[i], maxx);
    }
    
    for (int i=2; i<=k; i++) {
        stack<pair<int, int>> s;
        for (int j=1; j<=n; j++) {
            int best = dp[j-1][i-1];
            while (!s.empty() && a[s.top().second] <= a[j]) {
                best = min(best, s.top().first);
                s.pop();
            }
            if (s.empty())  dp[j][i] = best + a[j];
            else    dp[j][i] = min(best + a[j], dp[s.top().second][i-1]);
            s.push({best, j});
        }
    }
    cout << dp[n][k];
}

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