Submission #581186

#	Time	Username	Problem	Language	Result	Execution time	Memory
581186		FatihSolak	K blocks (IZhO14_blocks)	C++17	100 / 100	181 ms	2452 KiB

blocks

#include <bits/stdc++.h>
#define N 100005
using namespace std;
int a[N];
int dp[N];
int ndp[N];
void solve(){
    int n,k;
    cin >> n >> k;
    for(int i = 1;i<=n;i++){
        cin >> a[i];
        dp[i] = 1e9;
    }
    for(int x = 1;x<=k;x++){
        for(int i = 0;i<=n;i++){
            ndp[i] = 1e9;
        }
        stack<pair<int,int>> st;
        for(int i = x;i<=n;i++){
            int mini = dp[i-1];
            while(st.size() && a[i] >= a[st.top().first]){
                mini = min(mini,st.top().second);
                st.pop();
            }
            if(st.empty() || (a[st.top().first] + st.top().second > a[i]  + mini)){
                st.push({i,mini});
            }
            ndp[i] = a[st.top().first] + st.top().second;
        }
        for(int i = 0;i<=n;i++){
            dp[i] = ndp[i];
            //cout << dp[i] << " ";
        }
        //cout << endl;
    }
    cout << dp[n];
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    #ifdef Local
        freopen("in.txt","r",stdin);
        freopen("out.txt","w",stdout);
    #endif
    int t = 1;
    //cin >> t;
    while(t--){
        solve();
    }
    #ifdef Local
        cout << endl << fixed << setprecision(2) << 1000.0*clock()/CLOCKS_PER_SEC << " milliseconds.";
    #endif
}

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