Submission #334101

#	Time	Username	Problem	Language	Result	Execution time	Memory
334101		mariamirabella2	K blocks (IZhO14_blocks)	C++14	0 / 100	1 ms	384 KiB

blocks

#include <iostream>

using namespace std;
long long rm[100005][20],log2[100005],n,k,a[100005];
long long d[100005][3];


long long rmq(long long x,long long y){
    return max(rm[x][log2[y-x+1]],rm[y-(1<<log2[y-x+1])+1][log2[y-x+1]]);
}


void dve(long long j, long long st, long long dr,long long splitl,long long splitr) {

    if(st > dr)
        return;
    long long mj = (st + dr) >> 1;
    long long x=(1LL<<50);
    long long splitmj=1;
    for(long long st=splitl;st<=min(splitr,mj);st++){

                if(x > d[st][(j+1)%2]+rmq(st+1,mj)) {
                x=d[st][(j+1)%2]+rmq(st+1,mj);
                splitmj = st;
                }
            }
            d[mj][j]=x;
            dve(j,st,mj-1,splitl,splitmj);
            dve(j,mj+1,dr,splitmj,splitr);

}

int main()
{
    ///d[i][j]-costul daca impart primele i elemente in j secv
    cin>>n>>k;
    for(long long i=1;i<=n;i++){
        cin>>a[i];
    }
    for(long long i=1;i<=n;i++){
        rm[i][0]=a[i];
    }
    for(long long j=1;(1<<j)<=n;j++){
        for(long long i=1;i<=n-(1<<j)+1;i++){
            rm[i][j]= max(rm[i][j-1],rm[i+(1<<(j-1))][j-1]);
        }
    }
    for(long long i=2;i<=n;i++){
        log2[i]=log2[i/2]+1;
    }
    for(long long i=1;i<=n;i++){
        d[i][1]=max(d[i-1][1],1LL*a[i]);
    }
    for(long long j=2;j<=k;j++){
        dve(j%2,1,n,1,n);
    }
    cout<<d[n][k%2];
    return 0;
}

Compilation message (stderr)

blocks.cpp:4:26: warning: built-in function 'log2' declared as non-function [-Wbuiltin-declaration-mismatch]
    4 | long long rm[100005][20],log2[100005],n,k,a[100005];
      |                          ^~~~

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