Submission #581158

#	Time	Username	Problem	Language	Result	Execution time	Memory
581158		FatihSolak	K blocks (IZhO14_blocks)	C++17	0 / 100	1 ms	340 KiB

blocks

#include <bits/stdc++.h>
#define N 100005
#define K 105
#define M 20
using namespace std;
int a[N];
int sp[N][M];
int dp[N];
int ndp[N];
int val[N];
int cost(int l,int r){
    return max(sp[l][val[r-l+1]],sp[r - (1<<val[r-l+1]) + 1][val[r-l+1]]);
}
void dq(int l,int r,int optl,int optr){
    if(l > r)
        return;
    int m = (l + r)/2;
    ndp[m] = 1e9;
    int opt = optl;
    for(int i = optl;i<=min(optr,m);i++){
        if(dp[i-1] + cost(i,m) < ndp[m]){
            opt = i;
            ndp[m] = dp[i-1] + cost(i,m);
        }
    }
    dq(l,m-1,optl,opt);
    dq(m+1,r,opt,optr);
}
void solve(){
    int n,k;
    cin >> n >> k;
    int cnt = 0;
    for(int i = 1;i<=n;i++){
        cin >> a[i];
        sp[i][0] = a[i];
        if(i > (1<<(cnt+1)))
            cnt++;
        val[i] = cnt;
        dp[i] = 1e9;
    }
    for(int j = 1;j<M;j++){
        for(int i = 1;i<=n;i++){
            if(i + (1<<j) - 1 <= n){
                sp[i][j] = max(sp[i][j-1],sp[i + (1<<(j-1))][j-1]);
            }
        }
    }
    for(int i = 1;i<=k;i++){
        dq(1,n,1,n);
        for(int j = 1;j<=n;j++){
            dp[j] = ndp[j];
            //cout << dp[j] << " ";
        }
        dp[0] = 1e9;
        //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: 0 / 14
• Subtask 2: 0 / 18
• Subtask 3: 0 / 21
• Subtask 4: 0 / 47